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Universidade de Brasília
1.
Mirela Alves Dias.
Ensaio clínico randomizado para avaliação do efeito otoprotetor do extrato de Ginkgo Biloba, por meio das emissões otoacústicas por produto de distorção, em pacientes sob tratamento com cisplatina.
Degree: 2008, Universidade de Brasília
URL: http://bdtd.bce.unb.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=4499
► A ototoxicidade é a alteração provocada por drogas que comprometem a função auditiva e/ou vestibular. Uma dessas drogas é a cisplatina (CDDP), um potente agente…
(more)
▼ A ototoxicidade é a alteração provocada por drogas que comprometem a função auditiva e/ou vestibular. Uma dessas drogas é a cisplatina (CDDP), um potente agente antineoplásico utilizado no tratamento do câncer, tanto de crianças quanto de adultos, mas que possui vários efeitos colaterais, entre os quais a ototoxicidade, que pode limitar seu uso. Atualmente considera-se que o mecanismo de ototoxicidade da cisplatina ocorre por alterações no sistema antioxidante das células ciliadas externas (CCE) da cóclea. Em razão disso, diferentes drogas antioxidantes têm sido testadas para avaliar o potencial otoprotetor quando utilizadas conjuntamente com cisplatina. O teste de emissão otoacústica por produto de distorção (EOAPD) tem se mostrado um exame sensível para o diagnóstico de alterações nas CCEs e tem sido utilizado na monitorização de pacientes submetidos a tratamento com drogas ototóxicas. O nosso objetivo foi avaliar, usando-se o teste de EOAPD, o efeito do extrato padronizado de ginkgo biloba (EGB761), de conhecida propriedade antioxidante, como otoprotetor contra a ação da cisplatina. O estudo foi conduzido em indivíduos que iriam iniciar tratamento com cisplatina. Eles foram randomicamente alocados em dois grupos: grupo estudo (GE) (n = 08), que recebeu EGB761(240mg/dia) e CDDP, e o grupo controle (GC) (n = 07), que recebeu placebo e CDDP. Ambos os grupos foram orientados a ingerir a medicação antes da primeira dose de cisplatina. Eles foram tratados e acompanhados por um período aproximado de 90 dias. As doses de cisplatina variaram, atingindo um total cumulativo de 300mg/m2. Comparações foram feitas entre as medidas iniciais, ou seja, antes de iniciar-se o tratamento com CDDP, e aqueles registros obtidos após a última dose cumulativa de CDDP. Os indivíduos do GC apresentaram uma redução das amplitudes médias das EOAPDs e da relação sinal/ruído (S/R), na freqüência de 8KHz, com p<0,05, enquanto nos indivíduos do GE não foi observada essa redução. Nós concluímos que o EGB761, em virtude de suas propriedades antioxidantes, mostrou potencial efeito otoprotetor em indivíduos sob tratamento com cisplatina.
The ototoxicity is an alteration caused by drugs that compromises the auditory and vestibular functions. The cisplatin (CDDP) is a potent antineoplastic agent used for the treatment of cancer in both adults and children although it has several side effects. The cisplatin ototoxicity is a dose-limiting condition. Current opinion is that cisplatin ototoxicity occurs due to alterations in the antioxidant system of the outer hair cells (OHC) of the cochlea. Because this, different antioxidant drugs have been tested to evaluate the potential otoprotector effect when combined with cisplatin. The distortionproduct otoacoustic emission (DPOAE) has been showed to be a sensitive test for diagnosis of OHC injury and has been used for monitoring treatment with ototoxic drugs. Our proposal was to evaluate, using DPOAE test, the action of ginkgo biloba extract (EGB761), which has a known antioxidant property, as a possible…
Advisors/Committee Members: Vanessa Furtado de Almeida, Carlos Augusto Costa Pires de Oliveira, Pedro Luiz Tauil, Alessandra Ramos Venosa.
Subjects/Keywords: otoproteção; ototoxicity; ginkgo biloba; emissão otoacústica por produto de distorção; CIENCIAS DA SAUDE; cisplatina; ototoxicidade; ginkgo biloba; cisplatin; otoprotection; distortion-product otoacoustic emission
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APA (6th Edition):
Dias, M. A. (2008). Ensaio clínico randomizado para avaliação do efeito otoprotetor do extrato de Ginkgo Biloba, por meio das emissões otoacústicas por produto de distorção, em pacientes sob tratamento com cisplatina. (Thesis). Universidade de Brasília. Retrieved from http://bdtd.bce.unb.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=4499
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Dias, Mirela Alves. “Ensaio clínico randomizado para avaliação do efeito otoprotetor do extrato de Ginkgo Biloba, por meio das emissões otoacústicas por produto de distorção, em pacientes sob tratamento com cisplatina.” 2008. Thesis, Universidade de Brasília. Accessed December 14, 2019.
http://bdtd.bce.unb.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=4499.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Dias, Mirela Alves. “Ensaio clínico randomizado para avaliação do efeito otoprotetor do extrato de Ginkgo Biloba, por meio das emissões otoacústicas por produto de distorção, em pacientes sob tratamento com cisplatina.” 2008. Web. 14 Dec 2019.
Vancouver:
Dias MA. Ensaio clínico randomizado para avaliação do efeito otoprotetor do extrato de Ginkgo Biloba, por meio das emissões otoacústicas por produto de distorção, em pacientes sob tratamento com cisplatina. [Internet] [Thesis]. Universidade de Brasília; 2008. [cited 2019 Dec 14].
Available from: http://bdtd.bce.unb.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=4499.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Dias MA. Ensaio clínico randomizado para avaliação do efeito otoprotetor do extrato de Ginkgo Biloba, por meio das emissões otoacústicas por produto de distorção, em pacientes sob tratamento com cisplatina. [Thesis]. Universidade de Brasília; 2008. Available from: http://bdtd.bce.unb.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=4499
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
2.
Moukos, Antonios.
Συμβολή στην μελέτη της βαρηκοΐας από θόρυβο με σύγχρονες ακοολογικές μεθόδους.
Degree: 2014, National and Kapodistrian University of Athens; Εθνικό και Καποδιστριακό Πανεπιστήμιο Αθηνών (ΕΚΠΑ)
URL: http://hdl.handle.net/10442/hedi/40388
► The aim of this study was to prospectively evaluate the effect of noise on the hearing of a group of noise-exposed workers, using the methods…
(more)
▼ The aim of this study was to prospectively evaluate the effect of noise on the hearing of a group of noise-exposed workers, using the methods of audiometry and otoacoustic emissions. In a longitudinal follow-up of 76 noise exposed industrial workers, 34 (68 ears) of them were available for final evaluation after 9 years of observation. Distortion-product otoacoustic emissions (DP) at 65/55dB SPL and pure-tone audiometry were used to detect noise-induced inner ear changes. Repeated-measures analyses of variance were made on the subjects and in a control group, whereas significant threshold shifts (STS) and significant emission shifts (SES) were calculated. Both hearing thresholds and DP showed a high-frequency deterioration, but there was absence of statistical correlation between elevation of hearing thresholds and decrease of DP. There was no clear pattern between individual changes in audiometric thresholds and DP, and all combinations were present: ears with only STS, ears with only SES, ears with both STS and SES and ears with absence of STS and SES. Audiometric changes were maximal at 4 and 6 kHz and DP changes at 2 and 3 kHz. Since significant individual emission changes do not necessarily follow the same pattern as the group-averaged results, the use of only DP for monitoring of individual subjects is not advised. However, its use in conjunction with audiometry in hearing conservation programs is highly recommended.
Ο σκοπός της παρούσας μελέτης ήταν η προοπτική αξιολόγηση της επίδρασης του θορύβου στην ακοή μιάς ομάδας εργαζομένων, χρησιμοποιώντας τις μεθόδους της ακοομετρίας και των ωτοακουστικών εκπομπών. Σε μια μακροχρόνια παρακολούθηση 76 εργαζομένων σε περιβάλλον θορύβου μιάς βιομηχανικής μονάδας, οι 34 εξ αυτών (68 ώτα) ήταν διαθέσιμοι για τελική αξιολόγηση μετά την πάροδο 9 ετών. Για την διαπίστωση μεταβολών του έσω ωτός, λόγω της επίδρασης του θορύβου, χρησιμοποιήθηκαν ωτοακουστικές εκπομπές προϊόντα παραμόρφωσης (DP) στα 65/55 dB SPL και τονική ακοομετρία. Διεξήχθησαν αναλύσεις διασποράς για επαναλαμβανόμενες μετρήσεις στους εργαζομένους, αλλά και σε μιά ομάδα μαρτύρων, ενώ υπολογίσθηκαν οι σημαντικές μεταβολές των ακουστικών ουδών (ΣΜΟ) και οι σημαντικές μεταβολές των εκπομπών (ΣΜΕ). Τόσον οι ακουστικοί ουδοί, όσον και και οι DP έδειξαν επιδείνωση στις υψηλές συχνότητες, αλλά δεν υπήρχε στατιστική συσχέτιση μεταξύ της ανύψωσης των ουδών και της ελάττωσης των DP. Δεν διαπιστώθηκε σαφές πρότυπο μεταξύ των ατομικών μεταβολών στους ακουστικούς ουδούς και στις DP, όλοι δε οι συνδυασμοί ανευρέθηκαν: ώτα με μόνον ΣΜΟ, ώτα με μόνον ΣΜΕ, ώτα με ΣΜΟ και ΣΜΕ και ώτα με απουσία ΣΜΟ και ΣΜΕ. Οι ακοομετρικές μεταβολές ήταν μέγιστες στα 4 και 6 kHz, ενώ οι μεταβολές των DP στα 2 και 3 kHz. Δεδομένου ότι οι σημαντικές ατομικές μεταβολές των εκπομπών δεν ακολουθούν κατ’ ανάγκην το ίδιο πρότυπο με τις μεταβολές των μέσων τιμών της ομάδας, η χρήση των DP μόνον, για την παρακολούθηση των εργαζομένων δεν συνίσταται. Εντούτοις, η χρήση τους σε συνδυασμό με την ακοομετρία στα προγράμματα προστασίας της ακοής είναι…
Subjects/Keywords: Βαρηκοϊα εκ θορύβου; Ακοόγραμμα; Ωτοακουστικές εκπομπές προϊόντα παραμόρφωσης; Προστασία ακοής; Τυμπανόγραμμα; Noise-induced hearing loss; Audiogram; Distortion-product otoacoustic emission; Hearing conservation; Tympanogram
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Moukos, A. (2014). Συμβολή στην μελέτη της βαρηκοΐας από θόρυβο με σύγχρονες ακοολογικές μεθόδους. (Thesis). National and Kapodistrian University of Athens; Εθνικό και Καποδιστριακό Πανεπιστήμιο Αθηνών (ΕΚΠΑ). Retrieved from http://hdl.handle.net/10442/hedi/40388
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Moukos, Antonios. “Συμβολή στην μελέτη της βαρηκοΐας από θόρυβο με σύγχρονες ακοολογικές μεθόδους.” 2014. Thesis, National and Kapodistrian University of Athens; Εθνικό και Καποδιστριακό Πανεπιστήμιο Αθηνών (ΕΚΠΑ). Accessed December 14, 2019.
http://hdl.handle.net/10442/hedi/40388.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Moukos, Antonios. “Συμβολή στην μελέτη της βαρηκοΐας από θόρυβο με σύγχρονες ακοολογικές μεθόδους.” 2014. Web. 14 Dec 2019.
Vancouver:
Moukos A. Συμβολή στην μελέτη της βαρηκοΐας από θόρυβο με σύγχρονες ακοολογικές μεθόδους. [Internet] [Thesis]. National and Kapodistrian University of Athens; Εθνικό και Καποδιστριακό Πανεπιστήμιο Αθηνών (ΕΚΠΑ); 2014. [cited 2019 Dec 14].
Available from: http://hdl.handle.net/10442/hedi/40388.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Moukos A. Συμβολή στην μελέτη της βαρηκοΐας από θόρυβο με σύγχρονες ακοολογικές μεθόδους. [Thesis]. National and Kapodistrian University of Athens; Εθνικό και Καποδιστριακό Πανεπιστήμιο Αθηνών (ΕΚΠΑ); 2014. Available from: http://hdl.handle.net/10442/hedi/40388
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Pretoria
3.
[No author].
The use of artificial neural networks to predict pure
tone thresholds in normal and hearing- impaired ears with
distortion product otoacoustic emissions
.
Degree: 2009, University of Pretoria
URL: http://upetd.up.ac.za/thesis/available/etd-07292009-125000/
► In the evaluation of special populations, such as neonates, infants and malingerers, audiologist often have to rely heavily on objective measurements to assess hearing ability.…
(more)
▼ In the evaluation of special populations, such as
neonates, infants and malingerers, audiologist often have to rely
heavily on objective measurements to assess hearing ability.
Current objective audiological procedures such as tympanometry, the
acoustic reflex, auditory brainstem response and transient evoked
otoacoustic emissions, however, have certain limitations,
contributing to the need of an objective, non¬invasive, rapid,
economic test of hearing that evaluate hearing ability in a wide
range of frequencies. The purpose of this study was to investigate
distortion product otoacoustic emissions (DPOAEs) as an objective
test of hearing. The main aim was to attempt to predict hearing
ability at 500 Hz, 1000 Hz, 2000 Hz and 4000 Hz with DPOAEs and
artificial neural networks (ANNs) in normal and hearing-impaired
ears. Other studies that attempted to predict hearing ability with
DPOAEs and conventional statistical methods were only able to
distinguish between normal and impaired hearing. Back propagation
neural networks were trained with the pattern of all present and
absent DPOAE responses of 11 DPOAE frequencies of eight DP Grams
and pure tone thresholds at 500 Hz, 1000 Hz, 2000 Hz and 4000 Hz.
The neural network used the learned correlation between these two
data sets to predict hearing ability at 500 Hz, 1000 Hz, 2000 Hz
and 4000 Hz. Hearing ability was not predicted as a decibel value,
but into one of several categories spanning 10-15dB. Results
indicated that prediction accuracy of normal hearing was 92% at 500
Hz, 87% at 1000 Hz, 84% at 2000 Hz and 91% at 4000 Hz. The
prediction of hearing-impaired categories was less satisfactory,
due to insufficient data for the ANNs to train on. The variables
age and gender were included in some of the neural network runs to
determine their effect on the
distortion product. Gender had only a
minor positive effect on prediction accuracy, but age affected
prediction accuracy considerably in a positive way. The effect of
the amount of data that the neural network had to train on was also
investigated. A prediction versus ear count correlation strongly
suggested that the inaccurate predictions of hearing-impaired
categories is not a result of an inability of DPOAEs to predict
pure tone thresholds in hearing impaired ears, but a result of
insufficient data for the neural network to train on. This research
concluded that DPOAEs and ANNs can be used to accurately predict
hearing ability within 10dB in normal and hearing-impaired ears
from 500 Hz to 4000 Hz for hearing losses of up to 65dB
HL.
Advisors/Committee Members: Prof J J Kruger (advisor), Mrs M E Soer (advisor).
Subjects/Keywords: Prediction of hearing threshold;
Artificial neural networks;
Age and gender;
Distortion product otoacoustic emisslons;
Objective hearing assessment;
Otoacoustic errusslons;
UCTD
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
author], [. (2009). The use of artificial neural networks to predict pure
tone thresholds in normal and hearing- impaired ears with
distortion product otoacoustic emissions
. (Masters Thesis). University of Pretoria. Retrieved from http://upetd.up.ac.za/thesis/available/etd-07292009-125000/
Chicago Manual of Style (16th Edition):
author], [No. “The use of artificial neural networks to predict pure
tone thresholds in normal and hearing- impaired ears with
distortion product otoacoustic emissions
.” 2009. Masters Thesis, University of Pretoria. Accessed December 14, 2019.
http://upetd.up.ac.za/thesis/available/etd-07292009-125000/.
MLA Handbook (7th Edition):
author], [No. “The use of artificial neural networks to predict pure
tone thresholds in normal and hearing- impaired ears with
distortion product otoacoustic emissions
.” 2009. Web. 14 Dec 2019.
Vancouver:
author] [. The use of artificial neural networks to predict pure
tone thresholds in normal and hearing- impaired ears with
distortion product otoacoustic emissions
. [Internet] [Masters thesis]. University of Pretoria; 2009. [cited 2019 Dec 14].
Available from: http://upetd.up.ac.za/thesis/available/etd-07292009-125000/.
Council of Science Editors:
author] [. The use of artificial neural networks to predict pure
tone thresholds in normal and hearing- impaired ears with
distortion product otoacoustic emissions
. [Masters Thesis]. University of Pretoria; 2009. Available from: http://upetd.up.ac.za/thesis/available/etd-07292009-125000/

University of Pretoria
4.
Moepeng, Meshack.
Applicability
of Distortion Product Otoacoustic Emissions as a new health
surveillance technique for hearing screening in
industry.
Degree: M Communication Pathology, Speech-Language Pathology and
Audiology, 2017, University of Pretoria
URL: http://hdl.handle.net/2263/60391
► Background: Distortion product otoacoustic emissions (DPOAEs) are a promising screening technique for the early detection of subtle noise induced cochlear function changes. Objectives: To determine…
(more)
▼ Background:
Distortion product otoacoustic emissions
(DPOAEs) are a promising screening technique for the early
detection of subtle noise induced cochlear function changes.
Objectives: To determine the applicability of DPOAEs as a health
surveillance technique for the early detection of noise induced
hearing loss (NIHL) in workers at a steel manufacturing industry.
Methods: DPOAEs were recorded in 20 participants with no history of
occupational noise exposure and 20 participants exposed to noise in
the steel manufacturing industry. Participants were not exposed to
noise for at least 48 hours prior to testing. All participants were
male with normal audiometric thresholds of ?15 dB HL. The DPOAE
presence and response amplitude levels for different frequencies
were compared between the two groups. The study further evaluated
the short-term test-retest repeatability of DPOAE measurements, and
also compared the total test duration of performing DPOAEs to the
duration of screening audiometry. Results: The noise exposed group
had statistically significantly lower DPOAE response amplitudes
than the control group for all the tested frequencies;
(pɘ.001) at 2002 to 4004 Hz, and (p=0.01, p=0.001) at 6348
and 7996 Hz respectively, suggesting more cochlear damage in the
noise exposed group due to early outer hair cell damage. DPOAEs
showed very good reproducibility, and the average duration of
performing a set of DPOAEs was significantly shorter (461 ± 68.2
seconds) than the duration of performing audiometry (591 ± 76.9
seconds), pɘ.001. Conclusion: DPOAEs appeared to be a
sensitive technique in detecting noise induced subtle cochlear
function changes. DPOAEs could be used as a health surveillance
technique for the early detection of NIHL in the steel
manufacturing industry.
Advisors/Committee Members: Soer, Maggi E. (Magdalena Elizabeth) (advisor), Vinck, Bart M. (coadvisor).
Subjects/Keywords: Distortion
product otoacoustic emissions; Hearing
screening; Health
surveillance; Noise induced
hearing loss;
UCTD
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Moepeng, M. (2017). Applicability
of Distortion Product Otoacoustic Emissions as a new health
surveillance technique for hearing screening in
industry. (Masters Thesis). University of Pretoria. Retrieved from http://hdl.handle.net/2263/60391
Chicago Manual of Style (16th Edition):
Moepeng, Meshack. “Applicability
of Distortion Product Otoacoustic Emissions as a new health
surveillance technique for hearing screening in
industry.” 2017. Masters Thesis, University of Pretoria. Accessed December 14, 2019.
http://hdl.handle.net/2263/60391.
MLA Handbook (7th Edition):
Moepeng, Meshack. “Applicability
of Distortion Product Otoacoustic Emissions as a new health
surveillance technique for hearing screening in
industry.” 2017. Web. 14 Dec 2019.
Vancouver:
Moepeng M. Applicability
of Distortion Product Otoacoustic Emissions as a new health
surveillance technique for hearing screening in
industry. [Internet] [Masters thesis]. University of Pretoria; 2017. [cited 2019 Dec 14].
Available from: http://hdl.handle.net/2263/60391.
Council of Science Editors:
Moepeng M. Applicability
of Distortion Product Otoacoustic Emissions as a new health
surveillance technique for hearing screening in
industry. [Masters Thesis]. University of Pretoria; 2017. Available from: http://hdl.handle.net/2263/60391

University of Kansas
5.
Bargen, Gabriel Anne.
Relationship between Bilirubin and Auditory Function in Premature Neonates.
Degree: PhD, Hearing and Speech, 2010, University of Kansas
URL: http://hdl.handle.net/1808/6410
► Research has shown hyperbilirubinemia is more prevalent in preterm infants than in term infants. Hyperbilirubin is toxic to the central nervous system and may cause…
(more)
▼ Research has shown hyperbilirubinemia is more prevalent in preterm infants than in term infants. Hyperbilirubin is toxic to the central nervous system and may cause neurological impairments in newborns with the most consistent impairment being auditory dysfunction. However, national guidelines are needed which address bilirubin levels in premature infants. The study objective was to determine the relationship between bilirubin levels and auditory function in preterm infants. The auditory brainstem response (ABR) and
distortion product otoacoustic emission (DPOAE) were prospectively investigated in premature infants while monitoring total serum bilirubin (TSB) levels. Ten subjects with mean gestational age of 31.5 weeks and mean peak-TSB of 7.91 mg/dL were enrolled. The posthoc peak-TSB to birth weight ratio placed all subjects in the control group. Spearman's correlation coefficient indicated no significant correlation between peak-TSB levels and auditory function. Further research with hyperbilirubinemia subjects is needed to determine when preterm infants' auditory function is affected.
Advisors/Committee Members: Ferraro, John A. (advisor), Widen, Judith E. (cmtemember), Johnson, Tiffany A (cmtemember), Mayo, Matthew S (cmtemember), Parimi, Prabhu (cmtemember).
Subjects/Keywords: Health sciences; Audiology; Auditory brainstem response; Auditory function; Distortion product otoacoustic emissions; Hyperbilirubin; Infants; Premature
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Bargen, G. A. (2010). Relationship between Bilirubin and Auditory Function in Premature Neonates. (Doctoral Dissertation). University of Kansas. Retrieved from http://hdl.handle.net/1808/6410
Chicago Manual of Style (16th Edition):
Bargen, Gabriel Anne. “Relationship between Bilirubin and Auditory Function in Premature Neonates.” 2010. Doctoral Dissertation, University of Kansas. Accessed December 14, 2019.
http://hdl.handle.net/1808/6410.
MLA Handbook (7th Edition):
Bargen, Gabriel Anne. “Relationship between Bilirubin and Auditory Function in Premature Neonates.” 2010. Web. 14 Dec 2019.
Vancouver:
Bargen GA. Relationship between Bilirubin and Auditory Function in Premature Neonates. [Internet] [Doctoral dissertation]. University of Kansas; 2010. [cited 2019 Dec 14].
Available from: http://hdl.handle.net/1808/6410.
Council of Science Editors:
Bargen GA. Relationship between Bilirubin and Auditory Function in Premature Neonates. [Doctoral Dissertation]. University of Kansas; 2010. Available from: http://hdl.handle.net/1808/6410
6.
Tzanakakis, Michail.
Πρόγραμμα ανίχνευσης νεογνικής βαρηκοΐας.
Degree: 2018, University of Crete (UOC); Πανεπιστήμιο Κρήτης
URL: http://hdl.handle.net/10442/hedi/42822
► Objective: Comparison of the efficacy of Transitory Evoked Otoacoustic Emissions (TEOAEs) and Distortion Product Otoacoustic Emissions (DPOAEs) in a neonatal hearing screening protocol, based on…
(more)
▼ Objective: Comparison of the efficacy of Transitory Evoked Otoacoustic Emissions (TEOAEs) and Distortion Product Otoacoustic Emissions (DPOAEs) in a neonatal hearing screening protocol, based on a three-stage strategy.Methods: In the first stage, a hearing screening using both evoked emissions was conducted in 3,480 neonates from Μarch 2006 through January 2012. Both TEOAEs and DPOAEs were recorded. Neonates, who did not undergo the test before being discharged, were examined within 30 days at a scheduled appointment. Follow-up of the referred newborns (second-stage screening) was performed as an outpatient re-screening, within a month. The third-stage evaluation, i.e.,the diagnostic testing, included a clinical otolaryngological examination, high-frequency tympanometry at 1,000 Hz and Auditory Brainstem Response (ABR) measurements.Results: A total of 3,480 (97%) newborns (n =1,765 males) out of 3,595 infants were enrolled in the study. In the first stage evaluation, 8.9 % of the infants were referred according to TEOAEs, while the percentage of the referred infants for DPΟΑΕs was 25.7 %. At this initial assessment stage, the specificity of TEOAES and DPOAEs were determined as 92% and 75%, while positive predictive values (PPV) were 3.8 % and 1.3 %, respectively. In the second stage of evaluation, the specificity of TEOAES and DPOAEs were 86 % and 76 %, while the PPV increased to 18 % and 15 %, respectively.Conclusions: With a lower follow-up rate, TEOAEs testing was significantly easier to perform and more reliable compared to the DPOAEs test.Keywords: Newborn hearing screening, distortion product otoacoustic emissions, transient evoked otoacoustic emissions, hearing loss.
Σκοπός: Σύγκριση της αποτελεσματικότητας των Παροδικά Προκλητών Ωτοακουστικών Εκπομπών (TEOAEs) και των Ωτοακουστικών εκπομπών Προϊόντων Παραμόρφωσης (DPOAEs) σε ένα πρωτόκολλο ανίχνευσης νεογνικής βαρηκοΐας, βασισμένο σε στρατηγική τριών σταδίων.Μέθοδοι: Στο πρώτο στάδιο, διενεργήθηκε ανιχνευτικός έλεγχος ακοής με χρήση ΤΕΟΑΕ και DPOAE σε 3,480 νεογνά από το Μάρτιο του 2006 μέχρι τον Ιανουάριο του 2012. Καταγράφηκαν τόσο οι TEOAEs όσο και οι DPOAEs. Τα νεογνά που δεν υποβλήθηκαν σε εξέταση πριν την έξοδο από το μαιευτήριο, εξετάστηκαν μέσα σε διάστημα 30 ημερών σε προγραμματισμένο ραντεβού. Η επανεξέταση (δεύτερο στάδιο) των νεογνών που απέτυχαν στο πρώτο στάδιο έγινε μέσα σε ένα μήνα σε προγραμματισμένο ραντεβού. Το τρίτο –διαγνωστικό- στάδιο περιλάμβανε κλινική ωτορινολαρυγγολογική εξέταση, τυμπανομετρία υψηλών συχνοτήτων 1,000 Hz, μέτρηση Ακουστικών Προκλητών Εγκεφαλικού Στελέχους (ABR) και μέτρηση Ακουστικών Απαντήσεων Σταθερής Κατάστασης (ASSR).Αποτελέσματα: Συνολικά 3,480 (97%) νεογνά (n =1,765 αγόρια) από τα 3,595 νεογνά που γεννήθηκαν συμπεριλήφθηκαν στη μελέτη. Στην αξιολόγηση πρώτου σταδίου, το 8.9 % των νεογνών παραπέμθηκε λόγω αποτυχίας στις TEOAEs, ενώ το αντίστοιχο ποσοστό για τις DPΟΑΕs ήταν 25.7 %. Σε αυτή την αρχική φάση, η ακρίβεια των TEOAES και των DPOAEs ήταν αντίστοιχα 92% και 75%, ενώ οι θετική προγνωστική αξία (PPV)…
Subjects/Keywords: έλεγχος ακοής νεογνών; παροδικά προκλητά ωτοακουστικές εκπομπές,; Ωτοακουστικές εκπομπές προϊόντων παραμόρφωσης; Newborn hearing screening; Otoacoustic emissions; transitory evoked otoacoustic emissions; Distortion product otoacoustic emissions
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APA (6th Edition):
Tzanakakis, M. (2018). Πρόγραμμα ανίχνευσης νεογνικής βαρηκοΐας. (Thesis). University of Crete (UOC); Πανεπιστήμιο Κρήτης. Retrieved from http://hdl.handle.net/10442/hedi/42822
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Tzanakakis, Michail. “Πρόγραμμα ανίχνευσης νεογνικής βαρηκοΐας.” 2018. Thesis, University of Crete (UOC); Πανεπιστήμιο Κρήτης. Accessed December 14, 2019.
http://hdl.handle.net/10442/hedi/42822.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Tzanakakis, Michail. “Πρόγραμμα ανίχνευσης νεογνικής βαρηκοΐας.” 2018. Web. 14 Dec 2019.
Vancouver:
Tzanakakis M. Πρόγραμμα ανίχνευσης νεογνικής βαρηκοΐας. [Internet] [Thesis]. University of Crete (UOC); Πανεπιστήμιο Κρήτης; 2018. [cited 2019 Dec 14].
Available from: http://hdl.handle.net/10442/hedi/42822.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Tzanakakis M. Πρόγραμμα ανίχνευσης νεογνικής βαρηκοΐας. [Thesis]. University of Crete (UOC); Πανεπιστήμιο Κρήτης; 2018. Available from: http://hdl.handle.net/10442/hedi/42822
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Pretoria
7.
De Waal, Rouviere.
The use of
artificial neural networks to predict pure tone thresholds in
normal and hearing- impaired ears with distortion product
otoacoustic emissions.
Degree: Speech-Language Pathology and
Audiology, 2009, University of Pretoria
URL: http://hdl.handle.net/2263/26810
► In the evaluation of special populations, such as neonates, infants and malingerers, audiologist often have to rely heavily on objective measurements to assess hearing ability.…
(more)
▼ In the evaluation of special populations, such as
neonates, infants and malingerers, audiologist often have to rely
heavily on objective measurements to assess hearing ability.
Current objective audiological procedures such as tympanometry, the
acoustic reflex, auditory brainstem response and transient evoked
otoacoustic emissions, however, have certain limitations,
contributing to the need of an objective, non¬invasive, rapid,
economic test of hearing that evaluate hearing ability in a wide
range of frequencies. The purpose of this study was to investigate
distortion product otoacoustic emissions (DPOAEs) as an objective
test of hearing. The main aim was to attempt to predict hearing
ability at 500 Hz, 1000 Hz, 2000 Hz and 4000 Hz with DPOAEs and
artificial neural networks (ANNs) in normal and hearing-impaired
ears. Other studies that attempted to predict hearing ability with
DPOAEs and conventional statistical methods were only able to
distinguish between normal and impaired hearing. Back propagation
neural networks were trained with the pattern of all present and
absent DPOAE responses of 11 DPOAE frequencies of eight DP Grams
and pure tone thresholds at 500 Hz, 1000 Hz, 2000 Hz and 4000 Hz.
The neural network used the learned correlation between these two
data sets to predict hearing ability at 500 Hz, 1000 Hz, 2000 Hz
and 4000 Hz. Hearing ability was not predicted as a decibel value,
but into one of several categories spanning 10-15dB. Results
indicated that prediction accuracy of normal hearing was 92% at 500
Hz, 87% at 1000 Hz, 84% at 2000 Hz and 91% at 4000 Hz. The
prediction of hearing-impaired categories was less satisfactory,
due to insufficient data for the ANNs to train on. The variables
age and gender were included in some of the neural network runs to
determine their effect on the
distortion product. Gender had only a
minor positive effect on prediction accuracy, but age affected
prediction accuracy considerably in a positive way. The effect of
the amount of data that the neural network had to train on was also
investigated. A prediction versus ear count correlation strongly
suggested that the inaccurate predictions of hearing-impaired
categories is not a result of an inability of DPOAEs to predict
pure tone thresholds in hearing impaired ears, but a result of
insufficient data for the neural network to train on. This research
concluded that DPOAEs and ANNs can be used to accurately predict
hearing ability within 10dB in normal and hearing-impaired ears
from 500 Hz to 4000 Hz for hearing losses of up to 65dB
HL.
Advisors/Committee Members: Kruger, J.J. (advisor), Soer, Maggi E. (Magdalena Elizabeth) (advisor).
Subjects/Keywords: Prediction of
hearing threshold; Artificial
neural networks (ARN); Age and
gender; Distortion
product otoacoustic emisslons; Objective
hearing assessment; Otoacoustic
emission (OAE);
UCTD
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
De Waal, R. (2009). The use of
artificial neural networks to predict pure tone thresholds in
normal and hearing- impaired ears with distortion product
otoacoustic emissions. (Masters Thesis). University of Pretoria. Retrieved from http://hdl.handle.net/2263/26810
Chicago Manual of Style (16th Edition):
De Waal, Rouviere. “The use of
artificial neural networks to predict pure tone thresholds in
normal and hearing- impaired ears with distortion product
otoacoustic emissions.” 2009. Masters Thesis, University of Pretoria. Accessed December 14, 2019.
http://hdl.handle.net/2263/26810.
MLA Handbook (7th Edition):
De Waal, Rouviere. “The use of
artificial neural networks to predict pure tone thresholds in
normal and hearing- impaired ears with distortion product
otoacoustic emissions.” 2009. Web. 14 Dec 2019.
Vancouver:
De Waal R. The use of
artificial neural networks to predict pure tone thresholds in
normal and hearing- impaired ears with distortion product
otoacoustic emissions. [Internet] [Masters thesis]. University of Pretoria; 2009. [cited 2019 Dec 14].
Available from: http://hdl.handle.net/2263/26810.
Council of Science Editors:
De Waal R. The use of
artificial neural networks to predict pure tone thresholds in
normal and hearing- impaired ears with distortion product
otoacoustic emissions. [Masters Thesis]. University of Pretoria; 2009. Available from: http://hdl.handle.net/2263/26810
8.
Ramachandran, Virginia.
Longitudinal outcomes of distortion product otoacoustic emissions and wideband reflectance in infants.
Degree: PhD, Communication Sciences and Disorders, 2012, Wayne State University
URL: https://digitalcommons.wayne.edu/oa_dissertations/581
► Clinical practice has shown that some infants are born with, or develop a temporary conductive hearing loss characterized by the absence of measurable otoacoustic…
(more)
▼ Clinical practice has shown that some infants are born with, or develop a temporary conductive hearing loss characterized by the absence of measurable
otoacoustic emissions (OAEs) but normal sensorineural hearing. This transient situation interferes with the process of universal newborn hearing screening and identification.
The purpose of this prospective, longitudinal study was to describe outcomes of
distortion product OAE (DPOAE) screening in infants at birth, and one, four, eight, and twelve weeks of age. In addition, wideband reflectance (WBR) measures, which have the potential to help characterize outer-ear canal and middle-ear function, were examined to determine their potential utility in identifying DPOAE screening outcomes.
Beginning with a sample of 50% of ears that passed the initial DPOAE screening at birth, results showed that passing outcomes rose over the course of time, at rates of 72.1%, 84.6%, 86.0%, and 96.0% at weeks one, four, eight, and twelve, respectively. Rates of new fails - ears that had passed the screening at a previous time point - also increased over time, with the exception of the last time point, at which no new failing outcomes were seen. These data suggest that twelve weeks would be the most efficient time for re-evaluation of infants, and that four weeks would be an appropriate alternative.
Confidence intervals of reflectance measures were calculated for DPOAE outcomes at each time point. Reflectance outcomes were distributed such that fail and pass DPOAE outcomes could be predicted from the highest and lowest values, with an area of ambiguity in between. Receiver operating characteristic curves were calculated to determine the reflectance frequencies that would provide the highest predictive value at each time point. In addition, this method was used to determine how well WBR could be used to predict DPOAE outcomes at future time points. The predictive value of WBR for future DPOAE outcomes was poorer than concurrent prediction and likely has little clinical utility at present. However, low WBR values in the face DPOAE screening failures should cause concern for sensorineural hearing loss and can be used to prioritize such infants for follow-up audiologic evaluation.
Advisors/Committee Members: Jean A. Andruski, Kenneth R. Bouchard.
Subjects/Keywords: Distortion Product Otoacoustic Emission, Hearing, Infant, Screening, Wideband Reflectance; Speech Pathology and Audiology
…Distortion product otoacoustic emission data were recorded
as the response - the noise floor in… …correlate with initial distortion product otoacoustic emissions (DPOAE) testing
outcomes… …products (distortion product
otoacoustic emissions). The presence of normal otoacoustic… …generated by the cochlea as a by-product of
function of the outer hair cells. Otoacoustic… …evoked otoacoustic emissions) or
primary tones whose interaction results in distortion…
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Ramachandran, V. (2012). Longitudinal outcomes of distortion product otoacoustic emissions and wideband reflectance in infants. (Doctoral Dissertation). Wayne State University. Retrieved from https://digitalcommons.wayne.edu/oa_dissertations/581
Chicago Manual of Style (16th Edition):
Ramachandran, Virginia. “Longitudinal outcomes of distortion product otoacoustic emissions and wideband reflectance in infants.” 2012. Doctoral Dissertation, Wayne State University. Accessed December 14, 2019.
https://digitalcommons.wayne.edu/oa_dissertations/581.
MLA Handbook (7th Edition):
Ramachandran, Virginia. “Longitudinal outcomes of distortion product otoacoustic emissions and wideband reflectance in infants.” 2012. Web. 14 Dec 2019.
Vancouver:
Ramachandran V. Longitudinal outcomes of distortion product otoacoustic emissions and wideband reflectance in infants. [Internet] [Doctoral dissertation]. Wayne State University; 2012. [cited 2019 Dec 14].
Available from: https://digitalcommons.wayne.edu/oa_dissertations/581.
Council of Science Editors:
Ramachandran V. Longitudinal outcomes of distortion product otoacoustic emissions and wideband reflectance in infants. [Doctoral Dissertation]. Wayne State University; 2012. Available from: https://digitalcommons.wayne.edu/oa_dissertations/581
9.
Poon, Emily.
Interactive effects of developmental PCB exposure and relevant environmental risks on the auditory system.
Degree: PhD, 0323, 2012, University of Illinois – Urbana-Champaign
URL: http://hdl.handle.net/2142/34355
► Polychlorinated biphenyls (PCBs) are environmental contaminants that can cross the mammalian placenta and mobilize from fat stores into breast milk to affect the developing offspring.…
(more)
▼ Polychlorinated biphenyls (PCBs) are environmental contaminants that can cross the mammalian placenta and mobilize from fat stores into breast milk to affect the developing offspring. Developmental PCB exposure has been shown to cause auditory deficits that last through adulthood. We assessed the interaction of PCBs with other environmental risks to examine if there were additive or interactive effects on auditory function. Rats were exposed developmentally to a unique environmental PCB mixture, the Fox River PCB mixture (FRM), and/or to molar equivalent doses of a commercial polybrominated diphenyl ether (PBDE) mixture, DE-71, that represents the PBDEs found in humans to assess the potential for additive effects of PCBs and PBDEs on cochlear function. In adulthood, the cochlear integrity of the offspring was tested by measuring
distortion product otoacoustic emissions (DPOAEs). DPOAE amplitudes were decreased and thresholds were elevated in the 6 mg/kg PCB group. Exposure to PBDEs alone did not cause DPOAE deficits. Importantly, there was an interactive effect from combined exposure such that the individual low doses of PCBs and PBDEs did not result in DPOAE deficits, but the two combined produced a deficit similar to that of the high dose PCB group. These effects were accompanied by sharp reductions in thyroxine (T4) concentrations measured in littermates at weaning.
We then assessed the interaction of developmental PCB exposure and noise exposure during adulthood to evaluate whether early PCB exposure increased the susceptibility to noise-induced hearing loss (NIHL). Since PCBs are known to cause hearing deficits via outer hair cell (OHC) damage, and the OHCs protect the inner ear from noise-induced damage, it was hypothesized that PCB-exposed rats would have more severe NIHL after intense noise exposure. Half of the rats developmentally exposed to PCBs were exposed to 97dB octave-band noise centered at 8 kHz for 4 hours a day for 5 consecutive days. Baseline DPOAEs were decreased in the PCB groups with the clearest effect in the 6 mg/kg PCB group. Rats in the 0, 1 and 3 mg/kg PCB groups all showed the same amount of temporary hearing loss 1 day after noise exposure, with partial recovery by 28 days after noise exposure. The PCB-exposed groups did not show any evidence of an increased susceptibility to the noise.
Surprisingly, many of the rats in the 6 mg/kg PCB group exhibited behavior characteristic of the first stage of audiogenic seizures (AGS), known as wild running near the onset of noise exposure and had to be excluded from this study. This led to a study to examine whether developmental PCB exposure increases the susceptibility to AGS in adulthood. Once rats completed the NIHL study, they were subjected to loud noise for 2 min, starting at 100dB, and they were re-exposed after 24-48 to hours at 105dB and then at 110dB if they did not exhibit clonus seizures at the lower noise intensities. Female rats exposed to 3 or 6 mg/kg PCBs had significantly higher incidences of AGS compared to controls. Male rats…
Advisors/Committee Members: Schantz, Susan L. (advisor), Schantz, Susan L. (Committee Chair), Juraska, Janice M. (committee member), Raetzman, Lori T. (committee member), Wickesberg, Robert E. (committee member).
Subjects/Keywords: Polychlorinated biphenyl (PCB); polybrominated diphenyl ether (PBDE); distortion product otoacoustic emission (DPOAE); Audiogenic Seizures
…for PCBs in our lab using distortion product otoacoustic emissions
(DPOAEs), which… …x29;. Perinatal
exposure to Aroclor 1254 impairs distortion product otoacoustic emissions… …frequencies using pure tone audiometry and with lower transient otoacoustic emission
(TEOAE…
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Poon, E. (2012). Interactive effects of developmental PCB exposure and relevant environmental risks on the auditory system. (Doctoral Dissertation). University of Illinois – Urbana-Champaign. Retrieved from http://hdl.handle.net/2142/34355
Chicago Manual of Style (16th Edition):
Poon, Emily. “Interactive effects of developmental PCB exposure and relevant environmental risks on the auditory system.” 2012. Doctoral Dissertation, University of Illinois – Urbana-Champaign. Accessed December 14, 2019.
http://hdl.handle.net/2142/34355.
MLA Handbook (7th Edition):
Poon, Emily. “Interactive effects of developmental PCB exposure and relevant environmental risks on the auditory system.” 2012. Web. 14 Dec 2019.
Vancouver:
Poon E. Interactive effects of developmental PCB exposure and relevant environmental risks on the auditory system. [Internet] [Doctoral dissertation]. University of Illinois – Urbana-Champaign; 2012. [cited 2019 Dec 14].
Available from: http://hdl.handle.net/2142/34355.
Council of Science Editors:
Poon E. Interactive effects of developmental PCB exposure and relevant environmental risks on the auditory system. [Doctoral Dissertation]. University of Illinois – Urbana-Champaign; 2012. Available from: http://hdl.handle.net/2142/34355

University of Georgia
10.
Uno, Yuzuho.
Aging effect on f2/f1 ratio function of distortion product otoacoustic emissions (DPOAEs).
Degree: MA, Communication Sciences, 2003, University of Georgia
URL: http://purl.galileo.usg.edu/uga_etd/uno_yuzuho_200308_ma
► It is known that physiologic changes occur in the cochlea as part of the aging process. DPOAEs are sounds generated in the cochlea while two…
(more)
▼ It is known that physiologic changes occur in the cochlea as part of the aging process. DPOAEs are sounds generated in the cochlea while two tones (f1 and f2) are present in the ear. This investigation examined the effects that the aging auditory system had on the absolute DPOAE amplitude and the f2/f1 ratio yielding the maximum DPOAE amplitude at four test frequencies (1500, 2000, 3000 and 4000Hz) in comparison to a group of young listeners. Fifteen young listeners (20-22 years) with normal hearing and fifteen old listeners (60-75 years) with normal hearing participated in this study. DPOAEs were recorded and DPOAE responses from young and old groups were compared. This study shows the possibility that the f2/f1 ratio function of DPOAEs reflects physiologic changes in the aged cochlea. Additional research is needed to support the aging effect on the f2/f1 ratio function with more stringent criteria of normal hearing.
Advisors/Committee Members: Albert R. De Chicchis.
Subjects/Keywords: aging process; distortion product otoacoustic emissions (DPOAEs)
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Uno, Y. (2003). Aging effect on f2/f1 ratio function of distortion product otoacoustic emissions (DPOAEs). (Masters Thesis). University of Georgia. Retrieved from http://purl.galileo.usg.edu/uga_etd/uno_yuzuho_200308_ma
Chicago Manual of Style (16th Edition):
Uno, Yuzuho. “Aging effect on f2/f1 ratio function of distortion product otoacoustic emissions (DPOAEs).” 2003. Masters Thesis, University of Georgia. Accessed December 14, 2019.
http://purl.galileo.usg.edu/uga_etd/uno_yuzuho_200308_ma.
MLA Handbook (7th Edition):
Uno, Yuzuho. “Aging effect on f2/f1 ratio function of distortion product otoacoustic emissions (DPOAEs).” 2003. Web. 14 Dec 2019.
Vancouver:
Uno Y. Aging effect on f2/f1 ratio function of distortion product otoacoustic emissions (DPOAEs). [Internet] [Masters thesis]. University of Georgia; 2003. [cited 2019 Dec 14].
Available from: http://purl.galileo.usg.edu/uga_etd/uno_yuzuho_200308_ma.
Council of Science Editors:
Uno Y. Aging effect on f2/f1 ratio function of distortion product otoacoustic emissions (DPOAEs). [Masters Thesis]. University of Georgia; 2003. Available from: http://purl.galileo.usg.edu/uga_etd/uno_yuzuho_200308_ma
11.
Papakostas, Konstantinos.
Συσχέτιση μεταξύ ωτοακουστικών εκπομπών και εμβοών.
Degree: 2014, National and Kapodistrian University of Athens; Εθνικό και Καποδιστριακό Πανεπιστήμιο Αθηνών (ΕΚΠΑ)
URL: http://hdl.handle.net/10442/hedi/40685
► The aim of this study is to investigate whether specific types of otoacoustic emissionscan correlate with tinnitus. The main hypothesis to be tested is that…
(more)
▼ The aim of this study is to investigate whether specific types of otoacoustic emissionscan correlate with tinnitus. The main hypothesis to be tested is that the measuredemissions are affected in certain types of tinnitus which are due to mechanicalmalfunction of the cochlea.Studies have shown that the distortion product otoacoustic emissions (DPOAE) arealways detectable in the normal human ear and provide frequency detail which can beused for objective assessment of the status of the cochlea. Nevertheless, there is ashortage of well designed studies using DPOAE for the investigation of tinnitussufferers with normal hearing.The patients involved should have unilateral or bilateral tinnitus, no deafness or otherotological condition and be no more than 50 years old. A total of 43 patientsparticipated. Of those, 11 had bilateral tinnitus and the loudest reported site wasconsidered amongst a total of 43 ears with tinnitus. Fifty (50) people 50 years old andyounger without tinnitus, deafness or other condition were the control group.DPOAE data were obtained across a dense spectrum of 26 frequencies between 708 Hz-6165 Hz and were analysed accordingly; i. comparison between 43 ears with tinnitusand 50 control ears showed statistically significant decrease of DPOAE at the highfrequency end, i.e. above 5 kHz. ii. comparison between 32 non tinnitus ears from thepatients with unilateral symptoms and 50 control ears showed no significant difference.However, the same trend of reduced emissions at the high frequencies for the patients’ears was obvious. iii. within-subjects comparison of the 43 tinnitus ears with 32 nontinnitus ears showed no statistical difference, yet again the emissions of the tinnitus earswere lower above 3 kHz than the non tinnitus ears.In conclusion, results showed lower DPOAE amplitudes above 3 kHz for the tinnitusears, increasing trend in the non tinnitus ears of patients and largest amplitudes in thecontrol ears. The task of the study to demonstrate early indicators of cochlear changes intinnitus sufferers with normal hearing has been substantially reached by using moresensitive investigation methods such as DPOAE. Even if these changes have nocausative relation to tinnitus, this study contributes to the expansion of our knowledgeabout tonotopic alterations in the cochlea in certain tinnitus types.
Ο σκοπός της παρούσας μελέτης είναι να ερευνήσει, εάν συγκεκριμένες μορφέςωτοακουστικών εκπομπών μπορούν να συσχετιστούν με τις εμβοές. Η κύρια υπόθεσηπρος έλεγχο είναι ότι η ενέργεια που εκλύεται με τις ωτοακουστικές εκπομπέςμεταβάλλεται σε ορισμένες κατηγορίες εμβοών που οφείλονται σε μηχανικήδυσλειτουργία του κοχλία.Οι ωτοακουστικές εκπομπές προϊόντων παραμόρφωσης (DPOAE) είναι πάντοτεανιχνεύσιμες στο φυσιολογικό ανθρώπινο ους και αποτελέσματα έχουν δείξει ότιπαρέχουν ακρίβεια συχνότητας, πληροφορία η οποία μπορεί να χρησιμοποιηθεί γιααντικειμενική εκτίμηση της κατάστασης του κοχλία. Παρ’όλα αυτά δεν έχουνδημοσιευθεί καλά σχεδιασμένες συγκεκριμένες μελέτες ως προς τις DPOAE ατόμων μεφυσιολογική ακοή σε…
Subjects/Keywords: Εμβοές; Ωτοακουστικές εκπομπές; Προϊόντα παραμόρφωσης; Φυσιολογική ακοή; Κοχλίας; Tinnitus; Distortion product otoacoustic emissions; Normal hearing; Cochlea
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APA ·
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CSE |
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Manager
APA (6th Edition):
Papakostas, K. (2014). Συσχέτιση μεταξύ ωτοακουστικών εκπομπών και εμβοών. (Thesis). National and Kapodistrian University of Athens; Εθνικό και Καποδιστριακό Πανεπιστήμιο Αθηνών (ΕΚΠΑ). Retrieved from http://hdl.handle.net/10442/hedi/40685
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Papakostas, Konstantinos. “Συσχέτιση μεταξύ ωτοακουστικών εκπομπών και εμβοών.” 2014. Thesis, National and Kapodistrian University of Athens; Εθνικό και Καποδιστριακό Πανεπιστήμιο Αθηνών (ΕΚΠΑ). Accessed December 14, 2019.
http://hdl.handle.net/10442/hedi/40685.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Papakostas, Konstantinos. “Συσχέτιση μεταξύ ωτοακουστικών εκπομπών και εμβοών.” 2014. Web. 14 Dec 2019.
Vancouver:
Papakostas K. Συσχέτιση μεταξύ ωτοακουστικών εκπομπών και εμβοών. [Internet] [Thesis]. National and Kapodistrian University of Athens; Εθνικό και Καποδιστριακό Πανεπιστήμιο Αθηνών (ΕΚΠΑ); 2014. [cited 2019 Dec 14].
Available from: http://hdl.handle.net/10442/hedi/40685.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Papakostas K. Συσχέτιση μεταξύ ωτοακουστικών εκπομπών και εμβοών. [Thesis]. National and Kapodistrian University of Athens; Εθνικό και Καποδιστριακό Πανεπιστήμιο Αθηνών (ΕΚΠΑ); 2014. Available from: http://hdl.handle.net/10442/hedi/40685
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Université de Lorraine
12.
Rumeau, Cécile.
Évaluation de l'efficacité des réflexes de protection de l'oreille par la mesure des produits de distorsion acoustiques chez le rat : développement d'un nouvel outil clinique pour l'homme : Evaluation of the efficiency of hearing protection reflexes by measuring acoustic distorsion products in the rat : elaboration of a new clinical equipment for human.
Degree: Docteur es, Sciences de la vie et de la santé, 2013, Université de Lorraine
URL: http://www.theses.fr/2013LORR0091
► L'audiométrie tonale liminaire est l'outil de référence pour évaluer le fonctionnement auditif, mais c'est un outil subjectif qui mesure des élévations de seuils témoignant de…
(more)
▼ L'audiométrie tonale liminaire est l'outil de référence pour évaluer le fonctionnement auditif, mais c'est un outil subjectif qui mesure des élévations de seuils témoignant de dégâts irréversibles sur le système auditif. La mesure des produits de distorsions acoustiques (PDAs), reflet du fonctionnement cochléaire, permet de dépister précocement des altérations de l'oreille interne causées par le bruit ou certains solvants ototoxiques. A partir d'un paradigme de mesure basé sur un enregistrement continu du PDA cubique (2f1-f2) et une stimulation controlatérale, nous avons pu expliquer, chez le rat, les effets pharmacologiques du toluène. Ce solvant aromatique agirait en particulier sur les centres nerveux impliqués dans le réflexe de protection acoustique de l'oreille moyenne. Devant les résultats obtenus chez l'animal, un prototype d'appareil adapté à l'homme a été mis au point, baptisé EchoScan. L'EchoScan a été testé sur 50 volontaires sains normo-entendant lors d'un premier protocole de recherche clinique pour vérifier la reproductibilité des mesures. Un second protocole a ensuite été conduit pour tester l'outil chez des salariés en entreprise, selon plusieurs conditions d'exposition : témoins non exposés, salariés exposés au bruit, exposés aux solvants, exposés au bruit et aux solvants. Les résultats des deux premières conditions sont présentés dans ce mémoire. Ils confirment la pertinence de la mesure du seuil du réflexe de l'oreille moyenne pour évaluer les effets de l'exposition au bruit. Les résultats des sujets exposés aux solvants évalueront la sensibilité de l'EchoScan dans la détection, voir la caractérisation des effets pharmacologiques de substances chimiques (inclusions en cours). Si l'avenir de l'EchoScan apparaît prometteur en médecine du travail, d'autres applications sont envisagées, comme l'étude des effets pharmacologiques des anesthésiques sur le réflexe de l'oreille moyenne
The pure-tone audiometry is a reference tool to assess auditory function but it is able to measure only threshold elevations showing irreversible damages. Measurement of distortion products oto-acoustic emissions (DPOAEs), reflecting the cochlear function, allows early detection of alterations in the inner ear caused by noise or some ototoxic solvents. From paradigm based on a continuous record of cubic DPOAEs (2f1-f2) and a contralateral stimulation triggering the middle-ear reflex, we could explain, in rats, the pharmacological effects of toluene. This aromatic solvent can act on the centers involved in the middle-ear acoustic protection reflex. With the results obtained in animals, a device adapted to humans has been developed, called EchoScan. The EchoScan was tested on 50 healthy volunteers with normal hearing in a first clinical research protocol to verify in particular the reproducibility of its measurements. A second research protocol was then conducted to test this tool among company employees, according to several exposure conditions: unexposed controls, workers exposed to noise, exposed to solvents, exposed to…
Advisors/Committee Members: Campo, Pierre (thesis director), Parietti-Winkler, Cécile (thesis director).
Subjects/Keywords: Produits de distorsions acoustiques; Bruit; Solvant; Réflexe acoustique; Distortion product otoacoustic emissions; Noise; Solvent; Middle-ear reflex; 617.8; 612.858
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Rumeau, C. (2013). Évaluation de l'efficacité des réflexes de protection de l'oreille par la mesure des produits de distorsion acoustiques chez le rat : développement d'un nouvel outil clinique pour l'homme : Evaluation of the efficiency of hearing protection reflexes by measuring acoustic distorsion products in the rat : elaboration of a new clinical equipment for human. (Doctoral Dissertation). Université de Lorraine. Retrieved from http://www.theses.fr/2013LORR0091
Chicago Manual of Style (16th Edition):
Rumeau, Cécile. “Évaluation de l'efficacité des réflexes de protection de l'oreille par la mesure des produits de distorsion acoustiques chez le rat : développement d'un nouvel outil clinique pour l'homme : Evaluation of the efficiency of hearing protection reflexes by measuring acoustic distorsion products in the rat : elaboration of a new clinical equipment for human.” 2013. Doctoral Dissertation, Université de Lorraine. Accessed December 14, 2019.
http://www.theses.fr/2013LORR0091.
MLA Handbook (7th Edition):
Rumeau, Cécile. “Évaluation de l'efficacité des réflexes de protection de l'oreille par la mesure des produits de distorsion acoustiques chez le rat : développement d'un nouvel outil clinique pour l'homme : Evaluation of the efficiency of hearing protection reflexes by measuring acoustic distorsion products in the rat : elaboration of a new clinical equipment for human.” 2013. Web. 14 Dec 2019.
Vancouver:
Rumeau C. Évaluation de l'efficacité des réflexes de protection de l'oreille par la mesure des produits de distorsion acoustiques chez le rat : développement d'un nouvel outil clinique pour l'homme : Evaluation of the efficiency of hearing protection reflexes by measuring acoustic distorsion products in the rat : elaboration of a new clinical equipment for human. [Internet] [Doctoral dissertation]. Université de Lorraine; 2013. [cited 2019 Dec 14].
Available from: http://www.theses.fr/2013LORR0091.
Council of Science Editors:
Rumeau C. Évaluation de l'efficacité des réflexes de protection de l'oreille par la mesure des produits de distorsion acoustiques chez le rat : développement d'un nouvel outil clinique pour l'homme : Evaluation of the efficiency of hearing protection reflexes by measuring acoustic distorsion products in the rat : elaboration of a new clinical equipment for human. [Doctoral Dissertation]. Université de Lorraine; 2013. Available from: http://www.theses.fr/2013LORR0091

Pontifícia Universidade Católica de São Paulo
13.
Vanessa Sinelli Pinto.
Emissões otoacústicas: produto de distorção em lactentes de até dois meses de idade.
Degree: 2005, Pontifícia Universidade Católica de São Paulo
URL: http://www.sapientia.pucsp.br//tde_busca/arquivo.php?codArquivo=1478
► Introdução A emissão otoacústica-produto de distorção tem sido utilizada devido às suas características específicas de avaliar bandas de freqüências altas e de detectar perdas auditivas…
(more)
▼ Introdução A emissão otoacústica-produto de distorção tem sido utilizada devido às suas características específicas de avaliar bandas de freqüências altas e de detectar perdas auditivas em estágios iniciais, sendo essencial na triagem auditiva neonatal e na bateria de testes que envolvem a avaliação audiológica infantil. Portanto, há uma necessidade de se estabelecer parâmetros para análise do registro das EOAPD em lactentes, com a finalidade de utilizá-los como critério clínico na avaliação audiológica. Objetivo Descrever os achados do registro das emissões otoacústicas-produto de distorção em lactentes de até dois meses de idade por meio da análise do nível de resposta, do nível de ruído e da relação sinal/ruído em todas as bandas de freqüências; da análise do nível de resposta em relação às variáveis: dias de vida, gênero, pico de pressão na timpanometria e estado do lactente durante o exame e da distribuição do percentil do nível de resposta. Metodologia Foram avaliados 138 lactentes, todos nascidos a termo, sem indicadores de risco para perda auditiva e que passaram na triagem auditiva. Os parâmetros utilizados para este registro foram: L1= 65 dBNPS e L2= 50 dBNPS no equipamento ILO292 Otodynamic. Resultados Foram avaliados 70 lactentes do gênero masculino e 68 do feminino, com idade variando de 6 a 65 dias de vida. As medianas do nível de resposta das EOAPD para cada freqüência (f2) foram de: 6,7 dBNPS para 1001 Hz; 11,5 dBNPS para 1257 Hz; 14,2 dBNPS para 1587 Hz; 14,2 dBNPS para 2002 Hz; 13,7 dBNPS para 2515 Hz; 13,7 dBNPS para 3174 Hz; 15,5 dBNPS para 4004 Hz; 16,3 dBNPS para 5042 Hz e 6,0 dBNPS para 6348 Hz. As medianas do nível de ruído para cada freqüência (f2) foram de: 4,9 dBNPS para 1001 Hz; 5,9 dBNPS para 1257 Hz; 6,0 dBNPS para 1587 Hz; -2,1 dBNPS para 2002 Hz; -12,5 dBNPS para 2515 Hz; -5,6 dBNPS para 3174 Hz; -8,9 dBNPS para 4004 Hz; -9,5 dBNPS para 5042 Hz e -4,4 dBNPS para 6348 Hz. As medianas da relação sinal/ruído para cada freqüência (f2) foram de: 1,5 dBNPS para 1001 Hz; 5,4 dBNPS para 1257 Hz; 7,7 dBNPS para 1587 Hz; 16,4 dBNPS para 2002 Hz; 18,9 dBNPS para 2515 Hz; 19,3 dBNPS para 3174 Hz; 24,2 dBNPS para 4004 Hz; 25,5 dBNPS para 5042 Hz e 10,5 dBNPS para 6348 Hz. Conclusões Houve uma tendência de diminuição do nível de resposta a partir dos 30 dias de vida. O pico de pressão na timpanometria definido por três grupos (entre -50 e +50 daPa; <-50 daPa e >+50 daPa) não influenciou no registro do nível de resposta. Não houve diferença estatisticamente significante entre gêneros e entre orelhas para o nível de resposta. O estado do lactente influenciou na relação sinal/ruído, sendo a melhor relação sinal/ruído no estado sono profundo. Os achados do percentil foram semelhantes aos encontrados na literatura. Portanto, para uma interpretação clínica, o percentil 5 pode sugerir perda auditiva e o percentil 95 pode sugerir audição dentro da normalidade, sendo os resultados entre esses dois percentis uma região de incerteza quanto às perdas auditivas
Introduction The distortion product otoacoustic…
Advisors/Committee Members: Doris Ruthy Lewis.
Subjects/Keywords: infant; Emissoes otoacusticas; Avaliacao audiologica infantil; FONOAUDIOLOGIA; audiologic assessment in infants; Lactentes; avaliação audiológica infantil; distortion product otoacoustic emissions; emissões otoacústicas-produto de distorção; Audiologia
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Pinto, V. S. (2005). Emissões otoacústicas: produto de distorção em lactentes de até dois meses de idade. (Thesis). Pontifícia Universidade Católica de São Paulo. Retrieved from http://www.sapientia.pucsp.br//tde_busca/arquivo.php?codArquivo=1478
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Pinto, Vanessa Sinelli. “Emissões otoacústicas: produto de distorção em lactentes de até dois meses de idade.” 2005. Thesis, Pontifícia Universidade Católica de São Paulo. Accessed December 14, 2019.
http://www.sapientia.pucsp.br//tde_busca/arquivo.php?codArquivo=1478.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Pinto, Vanessa Sinelli. “Emissões otoacústicas: produto de distorção em lactentes de até dois meses de idade.” 2005. Web. 14 Dec 2019.
Vancouver:
Pinto VS. Emissões otoacústicas: produto de distorção em lactentes de até dois meses de idade. [Internet] [Thesis]. Pontifícia Universidade Católica de São Paulo; 2005. [cited 2019 Dec 14].
Available from: http://www.sapientia.pucsp.br//tde_busca/arquivo.php?codArquivo=1478.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Pinto VS. Emissões otoacústicas: produto de distorção em lactentes de até dois meses de idade. [Thesis]. Pontifícia Universidade Católica de São Paulo; 2005. Available from: http://www.sapientia.pucsp.br//tde_busca/arquivo.php?codArquivo=1478
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

The Ohio State University
14.
Hazelbaker, Julie L.
Effect of bone conduction transducer placement on distortion
product otoacoustic emissions.
Degree: PhD, Speech and Hearing Science, 2004, The Ohio State University
URL: http://rave.ohiolink.edu/etdc/view?acc_num=osu1092677782
► The purpose of this study was to develop a technique to determine the magnitude of bone conducted sound in the cochlea when stimuli are delivered…
(more)
▼ The purpose of this study was to develop a technique
to determine the magnitude of bone conducted sound in the cochlea
when stimuli are delivered from three different locations on the
head.
Distortion product otoacoustic emissions (DPOAE) at 1000 and
2000 Hz were used as tools to determine cochlear response to
stimuli introduced via air conduction and bone conduction in three
subjects. The bone conduction transducer was moved to three head
locations (ipsilateral mastoid, contralateral mastoid and
forehead). The intensity of the emissions elicited was compared.
The differences in DPOAE magnitude created by varying the location
of the bone conduction transducer were compared with behavioral
threshold differences with the same transducers at the same
locations. It was assumed that results of behavioral measures would
provide a prediction of the relationship between air and bone
conducted DPOAE. However, in the current study, this was not the
case. Behavioral bone conduction threshold data did not predict
differences in DPOAE at different bone conduction transducer
locations. This was a somewhat surprising result and should be
considered further in future studies examining the properties of
DPOAE elicited by bone conduction. Additionally, a wide band noise
masker was introduced to the non-test ear when bone conducted
stimuli were introduced to make DPOAE and behavioral test
conditions as similar as possible. No great suppression effects
were noted across subjects for either frequency. This was likely
due to the shape and intensity of the contralateral masked
used.
Advisors/Committee Members: Feth, Lawrence (Advisor).
Subjects/Keywords: Health Sciences, Audiology; hearing; audiology; bone conduction; distortion product otoacoustic emissions
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Hazelbaker, J. L. (2004). Effect of bone conduction transducer placement on distortion
product otoacoustic emissions. (Doctoral Dissertation). The Ohio State University. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=osu1092677782
Chicago Manual of Style (16th Edition):
Hazelbaker, Julie L. “Effect of bone conduction transducer placement on distortion
product otoacoustic emissions.” 2004. Doctoral Dissertation, The Ohio State University. Accessed December 14, 2019.
http://rave.ohiolink.edu/etdc/view?acc_num=osu1092677782.
MLA Handbook (7th Edition):
Hazelbaker, Julie L. “Effect of bone conduction transducer placement on distortion
product otoacoustic emissions.” 2004. Web. 14 Dec 2019.
Vancouver:
Hazelbaker JL. Effect of bone conduction transducer placement on distortion
product otoacoustic emissions. [Internet] [Doctoral dissertation]. The Ohio State University; 2004. [cited 2019 Dec 14].
Available from: http://rave.ohiolink.edu/etdc/view?acc_num=osu1092677782.
Council of Science Editors:
Hazelbaker JL. Effect of bone conduction transducer placement on distortion
product otoacoustic emissions. [Doctoral Dissertation]. The Ohio State University; 2004. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=osu1092677782

The Ohio State University
15.
Wei, Lai.
Spectral-based tests for periodicities.
Degree: PhD, Statistics, 2008, The Ohio State University
URL: http://rave.ohiolink.edu/etdc/view?acc_num=osu1201706810
► In this thesis, tests for periodicity are investigated based on a spectral analysis of a time series. Some important fundamental theories of spectral analysis of…
(more)
▼ In this thesis, tests for periodicity are investigated
based on a spectral analysis of a time series. Some important
fundamental theories of spectral analysis of stationary and
harmonic processes are reviewed. A regression model is developed in
the frequency domain based on the Fourier transformation. We
present some of the periodogram based tests, which are the global
test and three local tests, i.e., the hearing test, local F test
and Thomson's multitaper test. We will show that most of the tests
can be derived from our regression model with the error term having
an approximately diagonal covariance matrix. The distribution of
the error term of the spectral regression model is based on the
asymptotic distribution of the tapered Fourier transform of the
error process. This asymptotic distribution has approximately a
diagonal covariance matrix when the sample size is large and the
spectral density functions (SDFs) of error processes have small
dynamic range. Standard global tests for periodicity are often
based on the assumption of a Gaussian IID error process. Using a
smoothing spline approach, we extend the global test to the non-IID
case. We contrast the F test in the time domain and the local F
test in the frequency domain as well as the global and local
spectral-based tests. Using regression-based F tests, we
demonstrate that asymptotic size and power calculations can be made
for some of these tests. We compare the size and power at finite
sample sizes, under a number of different experimental conditions.
According to the exploratory data analysis, we applied the local F
test to
Distortion Product Otoacoustic Emissions (DPOAEs),
collected in the Department of Speech and Hearing Sciences, OSU.
The logistic regression model and the noncentral F mixed effects
regression models are explored to capture the important features of
hearing data. In particular, noncentral-F mixed effects regression
models capture within-
subject-variability of the
distortion
products of healthy hearing subjects. The Penalized
Quasi-Likelihood method is used to estimate the model parameters
and we demonstrate how to do the model selection and
diagnosing.
Advisors/Committee Members: Craigmile, Peter (Advisor).
Subjects/Keywords: Statistics; Harmonic processes; Global and local spectral tests; Tapering; Maximum likelihood; Quasi-likelihood; Distortion product otoacoustic emissions; Noncentral-F mixed-effects model
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Wei, L. (2008). Spectral-based tests for periodicities. (Doctoral Dissertation). The Ohio State University. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=osu1201706810
Chicago Manual of Style (16th Edition):
Wei, Lai. “Spectral-based tests for periodicities.” 2008. Doctoral Dissertation, The Ohio State University. Accessed December 14, 2019.
http://rave.ohiolink.edu/etdc/view?acc_num=osu1201706810.
MLA Handbook (7th Edition):
Wei, Lai. “Spectral-based tests for periodicities.” 2008. Web. 14 Dec 2019.
Vancouver:
Wei L. Spectral-based tests for periodicities. [Internet] [Doctoral dissertation]. The Ohio State University; 2008. [cited 2019 Dec 14].
Available from: http://rave.ohiolink.edu/etdc/view?acc_num=osu1201706810.
Council of Science Editors:
Wei L. Spectral-based tests for periodicities. [Doctoral Dissertation]. The Ohio State University; 2008. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=osu1201706810

University of Pretoria
16.
Newland-Nell, Annette
Caroline.
Using distortion
product otoacoustic emissions to investigate the efficacy of
personal hearing protection.
Degree: Speech-Language Pathology and
Audiology, 2005, University of Pretoria
URL: http://hdl.handle.net/2263/22941
► This study aimed to investigate the effectiveness of the Quiet earplug noise protectors worn by a group of South African industrial workers exposed to excessive…
(more)
▼ This study aimed to investigate the effectiveness of the
Quiet earplug noise protectors worn by a group of South African
industrial workers exposed to excessive noise in the workplace.
This was achieved by investigating the prevalence and amplitudes of
distortion product otoacoustic emissions (DPOAEs), as they have
been found to be sensitive to the effects of noise on the cochlea
(Vinck, Van Cauwenberge, Leroy,&Corthals, 1999, p. 52). DPOAEs
were recorded before and after noise exposure and were compared in
order to determine whether the earplugs are providing sufficient
protection against cochlear damage. DPOAEs were recorded using a
test protocol where the primaries are fixed at L1 = 60dB SPL and L2
= 35dB SPL (L1 - L2 = 25dB) with an f2/f1 ratio of 1.18. The f2
frequencies were selected to correspond closely to the audiometric
test frequencies of 2000Hz, 3000Hz, 4000Hz, 6000Hz and 8000Hz. The
study found the prevalence of DPOAEs to be statistically stable and
repeatable. This was true for DPOAEs measured successively during
the same test sitting, as well as comparing prevalence determined
before and after exposure to eight hours of noise. DPOAE prevalence
alone was therefore not found to be a good indication of the
temporary threshold shift (TTS) associated with the effects of
noise on the cochlea. However, a significant finding of the study
was that normal DPOAEs were recorded in only six right ears (24%)
and seven left ears (28%) before noise exposure, even though all
the subjects presented with hearing thresholds better than 25dB
SPL. This may mean that cochlear pathology is already evident in
some of the subjects tested. Further results of the study showed
DPOAE amplitudes to be sensitive to the negative effects of
excessive noise, as there was a significant difference between
DPOAE amplitudes measured before and after the noise exposure.
DPOAE amplitudes, specifically in the frequencies that are known to
be affected by noise such as 4000Hz and 6000Hz, measured after the
work-shift were significantly smaller than those measured before
exposure to noise. Although correct usage of the earplugs could not
be controlled for the duration of the noise exposure, each
subject
was instructed on the correct usage of the hearing protection
before entering the noise zone. Bearing this limitation of the
study in mind, because DPOAE amplitudes were reduced the
implication is that the Quiet earplugs are not providing sufficient
protection against the harmful effects of noise.
Advisors/Committee Members: Soer, Maggi E. (Magdalena Elizabeth) (advisor).
Subjects/Keywords: Distortion
product otoacoustic emissions; Noise-induced
hearing loss; Hearing
protection; Temporary
threshold shift; Permanent
threshold shift; Industrial
noise;
UCTD
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Newland-Nell, A. (2005). Using distortion
product otoacoustic emissions to investigate the efficacy of
personal hearing protection. (Masters Thesis). University of Pretoria. Retrieved from http://hdl.handle.net/2263/22941
Chicago Manual of Style (16th Edition):
Newland-Nell, Annette. “Using distortion
product otoacoustic emissions to investigate the efficacy of
personal hearing protection.” 2005. Masters Thesis, University of Pretoria. Accessed December 14, 2019.
http://hdl.handle.net/2263/22941.
MLA Handbook (7th Edition):
Newland-Nell, Annette. “Using distortion
product otoacoustic emissions to investigate the efficacy of
personal hearing protection.” 2005. Web. 14 Dec 2019.
Vancouver:
Newland-Nell A. Using distortion
product otoacoustic emissions to investigate the efficacy of
personal hearing protection. [Internet] [Masters thesis]. University of Pretoria; 2005. [cited 2019 Dec 14].
Available from: http://hdl.handle.net/2263/22941.
Council of Science Editors:
Newland-Nell A. Using distortion
product otoacoustic emissions to investigate the efficacy of
personal hearing protection. [Masters Thesis]. University of Pretoria; 2005. Available from: http://hdl.handle.net/2263/22941
17.
Ζιάβρα, Ναυσικά.
Η συμβολή των ωτοακουστικών εκπομπών τύπου προϊόντων παραμόρφωσης στη διάγνωση των κοχλιακού τύπου βαρηκοϊών.
Degree: 2001, University of Ioannina; Πανεπιστήμιο Ιωαννίνων
URL: http://hdl.handle.net/10442/hedi/21810
Subjects/Keywords: Ωτοακουστικές εκπομπές; Προϊόντα παραμόρφωσης; Νευροαισθητήρια βαρηκοΐα; Distortion product otoacoustic emissions; Sensorineural hearing loss; Multiple tone pairs
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Ζιάβρα, . . (2001). Η συμβολή των ωτοακουστικών εκπομπών τύπου προϊόντων παραμόρφωσης στη διάγνωση των κοχλιακού τύπου βαρηκοϊών. (Thesis). University of Ioannina; Πανεπιστήμιο Ιωαννίνων. Retrieved from http://hdl.handle.net/10442/hedi/21810
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Ζιάβρα, Ναυσικά. “Η συμβολή των ωτοακουστικών εκπομπών τύπου προϊόντων παραμόρφωσης στη διάγνωση των κοχλιακού τύπου βαρηκοϊών.” 2001. Thesis, University of Ioannina; Πανεπιστήμιο Ιωαννίνων. Accessed December 14, 2019.
http://hdl.handle.net/10442/hedi/21810.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Ζιάβρα, Ναυσικά. “Η συμβολή των ωτοακουστικών εκπομπών τύπου προϊόντων παραμόρφωσης στη διάγνωση των κοχλιακού τύπου βαρηκοϊών.” 2001. Web. 14 Dec 2019.
Vancouver:
Ζιάβρα . Η συμβολή των ωτοακουστικών εκπομπών τύπου προϊόντων παραμόρφωσης στη διάγνωση των κοχλιακού τύπου βαρηκοϊών. [Internet] [Thesis]. University of Ioannina; Πανεπιστήμιο Ιωαννίνων; 2001. [cited 2019 Dec 14].
Available from: http://hdl.handle.net/10442/hedi/21810.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Ζιάβρα . Η συμβολή των ωτοακουστικών εκπομπών τύπου προϊόντων παραμόρφωσης στη διάγνωση των κοχλιακού τύπου βαρηκοϊών. [Thesis]. University of Ioannina; Πανεπιστήμιο Ιωαννίνων; 2001. Available from: http://hdl.handle.net/10442/hedi/21810
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Pretoria
18.
Stearn, Natalie Anne.
Hearing
screening for infants from a neonatal intensive care unit at a
state hospital.
Degree: Speech-Language Pathology and
Audiology, 2008, University of Pretoria
URL: http://hdl.handle.net/2263/26483
► Infant hearing screening (IHS) programs are not yet widespread in developing countries, such as South Africa. In order to ensure that the benefits of early…
(more)
▼ Infant hearing screening (IHS) programs are not yet
widespread in developing countries, such as South Africa. In order
to ensure that the benefits of early hearing detection and
intervention (EHDI) programs reach all infants, initial
recommendations for the implementation of IHS programs in South
Africa have been made by the Year 2002 Hearing Screening Position
Statement by the Health Professions Council of South Africa. One of
the platforms recommended for IHS in South Africa is the neonatal
intensive care unit (NICU). South African NICU infants are at an
increased risk for hearing loss, resultant of their high-risk birth
histories, as well as the prevalence of context-specific
environmental risk factors for hearing loss. There is currently a
general scarcity of contextual data regarding the prevalence of
risk indicators for hearing loss, and the prevalence of auditory
impairment in the South African NICU population. The objective of
this study was to describe an IHS program for NICU infants at a
secondary hospital in Gauteng, South Africa. A quantitative
descriptive research design was used to report on a cohort of 129
NICU infants followed up during a 29 month period. The objective of
the study was achieved by describing the sample of infants in terms
of the presence of specific risk indicators for hearing loss, the
efficiency of the IHS program, and the incidence of auditory
pathologies. Infants received their initial hearing screening as
part of their medical and developmental follow-up visit at the
hospital at three months of age. Routine rescreening visits were
scheduled three monthly, whilst infants who failed the hearing
screening were requested to return after three weeks for a
follow-up. A data collection sheet was used to collect biographical
information and risk indicators for hearing loss. Immittance
measurements were recorded in the form of high-frequency and
low-frequency tympanometry.
Distortion product otoacoustic
emissions (DPOAE) and automated auditory brainstem responses (AABR)
were recorded, as well as diagnostic auditory brainstem responses
(ABR) in cases where infants referred the screening protocol.
Results revealed that environmental risk factors present in this
sample included poor maternal education levels and prenatal
HIV/AIDS exposure. At least 32% of mothers participating in this
study did not complete high school. Prenatal HIV/AIDS exposure was
present in at least 21% of the current sample of infants. The
screening coverage rate fell short of the 95% benchmark set by the
Joint Committee on Infant Hearing (JCIH, 2000). A 67% coverage rate
was achieved with AABR screening, and an 88% coverage rate was
achieved with DPOAE screening. 93% of infants had immittance
screening performed on their initial visit to the IHS program.
According to the Fisher’s two-sided exact test and the logistic
regression procedure, high frequency tympanometry proved to be more
effective than low frequency tympanometry, when assessing the
middle ear functioning of infants younger than seven months when
compared…
Advisors/Committee Members: Dr D C D Swanepoel (advisor), Mrs S Strauss (advisor).
Subjects/Keywords: Developing
countries; Distortion
product otoacoustic emissions; Early hearing
detection and intervention;
Dpoae; High frequency
and low frequency immittance measur;
Ehdi; Infant hearing
loss; Infant hearing
screening;
Ihs; Neonatal
intensive care unit;
Nicu; Automated
auditory brainstem responses;
Aabr; Developed
countries;
UCTD
Record Details
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Stearn, N. A. (2008). Hearing
screening for infants from a neonatal intensive care unit at a
state hospital. (Masters Thesis). University of Pretoria. Retrieved from http://hdl.handle.net/2263/26483
Chicago Manual of Style (16th Edition):
Stearn, Natalie Anne. “Hearing
screening for infants from a neonatal intensive care unit at a
state hospital.” 2008. Masters Thesis, University of Pretoria. Accessed December 14, 2019.
http://hdl.handle.net/2263/26483.
MLA Handbook (7th Edition):
Stearn, Natalie Anne. “Hearing
screening for infants from a neonatal intensive care unit at a
state hospital.” 2008. Web. 14 Dec 2019.
Vancouver:
Stearn NA. Hearing
screening for infants from a neonatal intensive care unit at a
state hospital. [Internet] [Masters thesis]. University of Pretoria; 2008. [cited 2019 Dec 14].
Available from: http://hdl.handle.net/2263/26483.
Council of Science Editors:
Stearn NA. Hearing
screening for infants from a neonatal intensive care unit at a
state hospital. [Masters Thesis]. University of Pretoria; 2008. Available from: http://hdl.handle.net/2263/26483

University of Pretoria
19.
Nicole, Kostlin.
Objective
measures of function of the peripheral auditory system in adults
with diabetes mellitus type 1 and type 2 : a systematic review and
meta-analysis.
Degree: MA, Speech-Language Pathology and
Audiology, 2017, University of Pretoria
URL: http://hdl.handle.net/2263/59163
► Objective: This study aimed to systematically review and analyse the available peer-reviewed literature reporting on the results of distortion product otoacoustic emissions (DPOAEs), transient evoked…
(more)
▼ Objective: This study aimed to systematically review
and analyse the available peer-reviewed literature reporting on the
results of
distortion product otoacoustic emissions (DPOAEs),
transient evoked
otoacoustic emissions (TEOAEs) and click auditory
brainstem responses (c-ABRs) in adults with type 1 and type 2
diabetes mellitus (T1DM and T2DM).
Method: A comprehensive
literature search was conducted across three electronic databases
to identify English; peer-reviewed articles that included results
of OAEs (DPOAEs and TEOAEs) and c-ABR tests in adult subjects with
DM. Articles were selected according to predetermined selection
criteria and critically reviewed independently by two researchers.
Results: 15 studies met the inclusion criteria for the systematic
review while nine articles qualified for inclusion in the
meta-analysis. DPOAE studies reported significantly reduced
amplitudes with only one study reporting larger amplitudes.
Abnormal TEOAEs were reported in all TEOAE studies, although these
abnormalities were not always significant. Significantly delayed
c-ABRs were reported in all ABR studies. Analysis of c-ABR mean
wave latencies identified longer latencies for DM subjects,
particularly for wave III and V, as well as for IPL I-III and I-V.
Conclusions: Subjects with T1DM and T2DM may present with clinical
or subclinical impairment of the cochlear outer hair cells and both
the peripheral and central auditory pathway.
Advisors/Committee Members: Vinck, Bart M. (advisor), Heinze, Barbara M. (coadvisor).
Subjects/Keywords: Audiology; UCTD; Diabetes
mellitus; Hearing loss; Auditory
nerve; Auditory brainstem
responses; Distortion product
otoacoustic emissions
Record Details
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Nicole, K. (2017). Objective
measures of function of the peripheral auditory system in adults
with diabetes mellitus type 1 and type 2 : a systematic review and
meta-analysis. (Masters Thesis). University of Pretoria. Retrieved from http://hdl.handle.net/2263/59163
Chicago Manual of Style (16th Edition):
Nicole, Kostlin. “Objective
measures of function of the peripheral auditory system in adults
with diabetes mellitus type 1 and type 2 : a systematic review and
meta-analysis.” 2017. Masters Thesis, University of Pretoria. Accessed December 14, 2019.
http://hdl.handle.net/2263/59163.
MLA Handbook (7th Edition):
Nicole, Kostlin. “Objective
measures of function of the peripheral auditory system in adults
with diabetes mellitus type 1 and type 2 : a systematic review and
meta-analysis.” 2017. Web. 14 Dec 2019.
Vancouver:
Nicole K. Objective
measures of function of the peripheral auditory system in adults
with diabetes mellitus type 1 and type 2 : a systematic review and
meta-analysis. [Internet] [Masters thesis]. University of Pretoria; 2017. [cited 2019 Dec 14].
Available from: http://hdl.handle.net/2263/59163.
Council of Science Editors:
Nicole K. Objective
measures of function of the peripheral auditory system in adults
with diabetes mellitus type 1 and type 2 : a systematic review and
meta-analysis. [Masters Thesis]. University of Pretoria; 2017. Available from: http://hdl.handle.net/2263/59163
20.
Stamper, Greta.
Auditory Responses in Normal-Hearing, Noise-Exposed Ears.
Degree: PhD, Hearing and Speech, 2013, University of Kansas
URL: http://hdl.handle.net/1808/12994
► Recent investigations in animal ears have described temporary noise-induced hearing loss with permanent deafferentation for up to 50% of auditory nerve fibers in the high-frequency…
(more)
▼ Recent investigations in animal ears have described temporary noise-induced hearing loss with permanent deafferentation for up to 50% of auditory nerve fibers in the high-frequency region of the cochlea (Kujawa and Liberman, 2009; Lin et al., 2011, Furman et al., 2013). Although thresholds remained normal, evidence of the deafferentation was apparent in reduced wave I auditory brainstem response (ABR) amplitudes for high-level stimuli. It is unknown if the same phenomenon exists in the human ear. The goal of this research project was to characterize cochlear and auditory nerve function in human ears with normal behavioral thresholds that are regularly and voluntarily exposed to high levels of noise. Data were collected from 30 normal-hearing subjects with different voluntary noise-exposure backgrounds. Auditory function was assessed across a range of stimulus levels via the ABR and
distortion-
product otoacoustic emissions (DPOAEs). ABRs were collected in response to 1 and 4 kHz tone bursts and a click stimulus. DPOAEs were assessed at 1, 2 and 4 kHz. Significantly smaller amplitudes were seen in wave I of the ABR in response to high-level (e.g., 70 to 90 dB nHL) click and 4 kHz tone bursts in ears with greater noise-exposure backgrounds. There were no statistically significant differences in supra-threshold DPOAE level across ears with different noise-exposure histories. These findings are consistent with data from previous work completed in animals where the reduction in high-level wave I ABR responses was a result of deafferentation of high-threshold/low-spontaneous rate auditory nerve fibers. These data suggest a similar mechanism may be operating in human ears following exposure to high sound levels. Furthermore, data from the present study suggest noise-induced auditory damage in normal-hearing ears is only apparent when examining supra-threshold ABR responses.
Advisors/Committee Members: Johnson, Tiffany A (advisor), Chertoff, Mark E. (cmtemember), Ferraro, John (cmtemember), Peppi, Marcello (cmtemember), Wick, Jo (cmtemember).
Subjects/Keywords: Audiology; Auditory brainstem response; Distortion-product otoacoustic emissions; Hearing loss; Noise exposure
…product otoacoustic emissions (DPOAEs). Additionally, evidence of anatomical damage… …auditory function was assessed via auditory brainstem responses (ABRs) and
distortion… …unprecedented. Otoacoustic emissions
(OAEs), evoked-potential responses, and self-report… …emission
response is maximized by utilizing optimal stimulus parameters and if a more stable… …prior to ABRs to avoid potential temporary reduction in emission
level caused by the stimuli…
Record Details
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Record Details
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Stamper, G. (2013). Auditory Responses in Normal-Hearing, Noise-Exposed Ears. (Doctoral Dissertation). University of Kansas. Retrieved from http://hdl.handle.net/1808/12994
Chicago Manual of Style (16th Edition):
Stamper, Greta. “Auditory Responses in Normal-Hearing, Noise-Exposed Ears.” 2013. Doctoral Dissertation, University of Kansas. Accessed December 14, 2019.
http://hdl.handle.net/1808/12994.
MLA Handbook (7th Edition):
Stamper, Greta. “Auditory Responses in Normal-Hearing, Noise-Exposed Ears.” 2013. Web. 14 Dec 2019.
Vancouver:
Stamper G. Auditory Responses in Normal-Hearing, Noise-Exposed Ears. [Internet] [Doctoral dissertation]. University of Kansas; 2013. [cited 2019 Dec 14].
Available from: http://hdl.handle.net/1808/12994.
Council of Science Editors:
Stamper G. Auditory Responses in Normal-Hearing, Noise-Exposed Ears. [Doctoral Dissertation]. University of Kansas; 2013. Available from: http://hdl.handle.net/1808/12994

University of Pretoria
21.
[No author].
Hearing screening for infants from a neonatal intensive
care unit at a state hospital
.
Degree: 2008, University of Pretoria
URL: http://upetd.up.ac.za/thesis/available/etd-07212008-131627/
► Infant hearing screening (IHS) programs are not yet widespread in developing countries, such as South Africa. In order to ensure that the benefits of early…
(more)
▼ Infant hearing screening (IHS) programs are not yet
widespread in developing countries, such as South Africa. In order
to ensure that the benefits of early hearing detection and
intervention (EHDI) programs reach all infants, initial
recommendations for the implementation of IHS programs in South
Africa have been made by the Year 2002 Hearing Screening Position
Statement by the Health Professions Council of South Africa. One of
the platforms recommended for IHS in South Africa is the neonatal
intensive care unit (NICU). South African NICU infants are at an
increased risk for hearing loss, resultant of their high-risk birth
histories, as well as the prevalence of context-specific
environmental risk factors for hearing loss. There is currently a
general scarcity of contextual data regarding the prevalence of
risk indicators for hearing loss, and the prevalence of auditory
impairment in the South African NICU population. The objective of
this study was to describe an IHS program for NICU infants at a
secondary hospital in Gauteng, South Africa. A quantitative
descriptive research design was used to report on a cohort of 129
NICU infants followed up during a 29 month period. The objective of
the study was achieved by describing the sample of infants in terms
of the presence of specific risk indicators for hearing loss, the
efficiency of the IHS program, and the incidence of auditory
pathologies. Infants received their initial hearing screening as
part of their medical and developmental follow-up visit at the
hospital at three months of age. Routine rescreening visits were
scheduled three monthly, whilst infants who failed the hearing
screening were requested to return after three weeks for a
follow-up. A data collection sheet was used to collect biographical
information and risk indicators for hearing loss. Immittance
measurements were recorded in the form of high-frequency and
low-frequency tympanometry.
Distortion product otoacoustic
emissions (DPOAE) and automated auditory brainstem responses (AABR)
were recorded, as well as diagnostic auditory brainstem responses
(ABR) in cases where infants referred the screening protocol.
Results revealed that environmental risk factors present in this
sample included poor maternal education levels and prenatal
HIV/AIDS exposure. At least 32% of mothers participating in this
study did not complete high school. Prenatal HIV/AIDS exposure was
present in at least 21% of the current sample of infants. The
screening coverage rate fell short of the 95% benchmark set by the
Joint Committee on Infant Hearing (JCIH, 2000). A 67% coverage rate
was achieved with AABR screening, and an 88% coverage rate was
achieved with DPOAE screening. 93% of infants had immittance
screening performed on their initial visit to the IHS program.
According to the Fisher’s two-sided exact test and the logistic
regression procedure, high frequency tympanometry proved to be more
effective than low frequency tympanometry, when assessing the
middle ear functioning of infants younger than seven months when
compared…
Advisors/Committee Members: Dr D C D Swanepoel (advisor), Mrs S Strauss (advisor).
Subjects/Keywords: Developing countries;
Distortion product otoacoustic emissions;
Early hearing detection and intervention;
Dpoae;
High frequency and low frequency immittance
measur;
Ehdi;
Infant hearing loss;
Infant hearing screening;
Ihs;
Neonatal intensive care unit;
Nicu;
Automated auditory brainstem responses;
Aabr;
Developed countries;
UCTD
Record Details
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Record Details
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
author], [. (2008). Hearing screening for infants from a neonatal intensive
care unit at a state hospital
. (Masters Thesis). University of Pretoria. Retrieved from http://upetd.up.ac.za/thesis/available/etd-07212008-131627/
Chicago Manual of Style (16th Edition):
author], [No. “Hearing screening for infants from a neonatal intensive
care unit at a state hospital
.” 2008. Masters Thesis, University of Pretoria. Accessed December 14, 2019.
http://upetd.up.ac.za/thesis/available/etd-07212008-131627/.
MLA Handbook (7th Edition):
author], [No. “Hearing screening for infants from a neonatal intensive
care unit at a state hospital
.” 2008. Web. 14 Dec 2019.
Vancouver:
author] [. Hearing screening for infants from a neonatal intensive
care unit at a state hospital
. [Internet] [Masters thesis]. University of Pretoria; 2008. [cited 2019 Dec 14].
Available from: http://upetd.up.ac.za/thesis/available/etd-07212008-131627/.
Council of Science Editors:
author] [. Hearing screening for infants from a neonatal intensive
care unit at a state hospital
. [Masters Thesis]. University of Pretoria; 2008. Available from: http://upetd.up.ac.za/thesis/available/etd-07212008-131627/

University of Pretoria
22.
[No author].
Using distortion product otoacoustic emissions to
investigate the efficacy of personal hearing
protection
.
Degree: 2005, University of Pretoria
URL: http://upetd.up.ac.za/thesis/available/etd-03032004-104906/
► This study aimed to investigate the effectiveness of the Quiet earplug noise protectors worn by a group of South African industrial workers exposed to excessive…
(more)
▼ This study aimed to investigate the effectiveness of
the Quiet earplug noise protectors worn by a group of South African
industrial workers exposed to excessive noise in the workplace.
This was achieved by investigating the prevalence and amplitudes of
distortion product otoacoustic emissions (DPOAEs), as they have
been found to be sensitive to the effects of noise on the cochlea
(Vinck, Van Cauwenberge, Leroy,&Corthals, 1999, p. 52). DPOAEs
were recorded before and after noise exposure and were compared in
order to determine whether the earplugs are providing sufficient
protection against cochlear damage. DPOAEs were recorded using a
test protocol where the primaries are fixed at L1 = 60dB SPL and L2
= 35dB SPL (L1 - L2 = 25dB) with an f2/f1 ratio of 1.18. The f2
frequencies were selected to correspond closely to the audiometric
test frequencies of 2000Hz, 3000Hz, 4000Hz, 6000Hz and 8000Hz. The
study found the prevalence of DPOAEs to be statistically stable and
repeatable. This was true for DPOAEs measured successively during
the same test sitting, as well as comparing prevalence determined
before and after exposure to eight hours of noise. DPOAE prevalence
alone was therefore not found to be a good indication of the
temporary threshold shift (TTS) associated with the effects of
noise on the cochlea. However, a significant finding of the study
was that normal DPOAEs were recorded in only six right ears (24%)
and seven left ears (28%) before noise exposure, even though all
the subjects presented with hearing thresholds better than 25dB
SPL. This may mean that cochlear pathology is already evident in
some of the subjects tested. Further results of the study showed
DPOAE amplitudes to be sensitive to the negative effects of
excessive noise, as there was a significant difference between
DPOAE amplitudes measured before and after the noise exposure.
DPOAE amplitudes, specifically in the frequencies that are known to
be affected by noise such as 4000Hz and 6000Hz, measured after the
work-shift were significantly smaller than those measured before
exposure to noise. Although correct usage of the earplugs could not
be controlled for the duration of the noise exposure, each
subject
was instructed on the correct usage of the hearing protection
before entering the noise zone. Bearing this limitation of the
study in mind, because DPOAE amplitudes were reduced the
implication is that the Quiet earplugs are not providing sufficient
protection against the harmful effects of noise.
Advisors/Committee Members: Soer, Maggi E. (Magdalena Elizabeth) (advisor).
Subjects/Keywords: Distortion product otoacoustic emissions;
Noise-induced hearing loss;
Hearing protection;
Temporary threshold shift;
Permanent threshold shift;
Industrial noise;
UCTD
Record Details
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Record Details
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
author], [. (2005). Using distortion product otoacoustic emissions to
investigate the efficacy of personal hearing
protection
. (Masters Thesis). University of Pretoria. Retrieved from http://upetd.up.ac.za/thesis/available/etd-03032004-104906/
Chicago Manual of Style (16th Edition):
author], [No. “Using distortion product otoacoustic emissions to
investigate the efficacy of personal hearing
protection
.” 2005. Masters Thesis, University of Pretoria. Accessed December 14, 2019.
http://upetd.up.ac.za/thesis/available/etd-03032004-104906/.
MLA Handbook (7th Edition):
author], [No. “Using distortion product otoacoustic emissions to
investigate the efficacy of personal hearing
protection
.” 2005. Web. 14 Dec 2019.
Vancouver:
author] [. Using distortion product otoacoustic emissions to
investigate the efficacy of personal hearing
protection
. [Internet] [Masters thesis]. University of Pretoria; 2005. [cited 2019 Dec 14].
Available from: http://upetd.up.ac.za/thesis/available/etd-03032004-104906/.
Council of Science Editors:
author] [. Using distortion product otoacoustic emissions to
investigate the efficacy of personal hearing
protection
. [Masters Thesis]. University of Pretoria; 2005. Available from: http://upetd.up.ac.za/thesis/available/etd-03032004-104906/
23.
Tringali, Stéphane.
Contribution de la stimulation magnétique transcranienne répétitive à l’étude de la modulation centrale du fonctionnement cochléaire chez le sujet normo-entendant : Corticofugal modulation of peripheral auditory activity by repetitive transcranial magnetic stimulation of auditory cortex in healthy normal-hearing subjects.
Degree: Docteur es, Neurosciences, 2011, Université Claude Bernard – Lyon I
URL: http://www.theses.fr/2011LYO10289
► Le système auditif ascendant est constitué d’étages multiples procédant chacun à un traitement complexe du signal, traitement qui est modulé par un système descendant, formant…
(more)
▼ Le système auditif ascendant est constitué d’étages multiples procédant chacun à un traitement complexe du signal, traitement qui est modulé par un système descendant, formant de multiples boucles corticales et sous-corticales de rétroaction : le système efférent auditif. La boucle la plus longue de ce système serait capable de moduler directement le fonctionnement des cellules sensorielles de l’organe périphérique de l’audition. Le but de ce travail était d’étudier pour la première fois chez le sujet sain, l’effet d’une modulation corticale expérimentale sur le fonctionnement périphérique auditif. Nous avons donc recueilli, dans le cadre d’un protocole en double aveugle contre placebo, chez 34 sujets sains, l’activité des cellules ciliées externes de l’organe de Corti (cellules sensorielles directement en contact avec les fibres nerveuses efférentes), par le recueil d’otoémissions acoustiques (OEAs), avant et après stimulation du cortex auditif par une stimulation magnétique transcrânienne répétitive (SMTr). Une diminution de l’amplitude d’un type d’OEA a été obtenue du côté controlatéral à une stimulation du cortex auditif par SMTr à 10 Hz, effet qui ne peut être expliqué seulement par une action non-spécifique liée au bruit de la SMTr mais qui reste extrêmement variable d’un sujet à un autre. De plus, nous avons montré, du côté ipsilatéral à la SMTr, une diminution de l’amplitude des OEAs immédiatement après la SMTr, et uniquement pour les fortes intensités d’utilisation de la SMTr (donc, pour des niveaux de bruit plus importants), reflétant un effet direct du bruit de la SMTr sur les mécanismes cochléaires actifs, effet présent chez nos sujets même en cas de protections auditives de bonne qualité
The ascending auditory system involves multiples stages where the auditory information is processed and modulated by a top-down influence involving multiple cortico sub-cortical loops: the efferent auditory system. It is hypothesized that the longest loop of this efferent system is able to modulate directly the sensory cells of the peripheral auditory organ. The aim of this work was to study this system, to our knowledge for the first time in healthy humans, and to show a direct cortical influence on the auditory periphery. In a double blind randomized procedure, we recorded, in 34 healthy subjects, the activity of outer hair cells of the organ of Corti (sensory cells, that are in direct synaptic contact with medial efferent fibers), by means of evoked otoacoustic emissions (OAEs), before and after auditory cortex stimulation by repetitive transcranial magnetic stimulation (rTMS). We showed an inhibitory influence of the auditory cortical stimulation by 10 Hz rTMS on OAE amplitudes, predominantly in the ear contralateral to the rTMS, effect that cannot be attributed to a non-specific effect linked to the impulse noise associated with the rTMS technique, but that remains highly variable across subjects. In addition, we showed a decrease in OAE amplitude on the ipsilateral side, immediately after the rTMS session and…
Advisors/Committee Members: Collet, Lionel (thesis director).
Subjects/Keywords: Otoémissions acoustiques; Produits de distorsion acoustiques; Stimulation magnétique transcrânienne; Système efférent olivocochléaire médian; Voies auditives descendantes; Exposition sonore; Traumatisme acoustique; Otoacoustic emissions; Distortion product acoustic; Transcranial magnetic stimulation; Median cortico-olivocochlear system; Ascending auditory system; Noise exposure; Acoustic trauma; 573.89
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APA ·
Chicago ·
MLA ·
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CSE |
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to Zotero / EndNote / Reference
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APA (6th Edition):
Tringali, S. (2011). Contribution de la stimulation magnétique transcranienne répétitive à l’étude de la modulation centrale du fonctionnement cochléaire chez le sujet normo-entendant : Corticofugal modulation of peripheral auditory activity by repetitive transcranial magnetic stimulation of auditory cortex in healthy normal-hearing subjects. (Doctoral Dissertation). Université Claude Bernard – Lyon I. Retrieved from http://www.theses.fr/2011LYO10289
Chicago Manual of Style (16th Edition):
Tringali, Stéphane. “Contribution de la stimulation magnétique transcranienne répétitive à l’étude de la modulation centrale du fonctionnement cochléaire chez le sujet normo-entendant : Corticofugal modulation of peripheral auditory activity by repetitive transcranial magnetic stimulation of auditory cortex in healthy normal-hearing subjects.” 2011. Doctoral Dissertation, Université Claude Bernard – Lyon I. Accessed December 14, 2019.
http://www.theses.fr/2011LYO10289.
MLA Handbook (7th Edition):
Tringali, Stéphane. “Contribution de la stimulation magnétique transcranienne répétitive à l’étude de la modulation centrale du fonctionnement cochléaire chez le sujet normo-entendant : Corticofugal modulation of peripheral auditory activity by repetitive transcranial magnetic stimulation of auditory cortex in healthy normal-hearing subjects.” 2011. Web. 14 Dec 2019.
Vancouver:
Tringali S. Contribution de la stimulation magnétique transcranienne répétitive à l’étude de la modulation centrale du fonctionnement cochléaire chez le sujet normo-entendant : Corticofugal modulation of peripheral auditory activity by repetitive transcranial magnetic stimulation of auditory cortex in healthy normal-hearing subjects. [Internet] [Doctoral dissertation]. Université Claude Bernard – Lyon I; 2011. [cited 2019 Dec 14].
Available from: http://www.theses.fr/2011LYO10289.
Council of Science Editors:
Tringali S. Contribution de la stimulation magnétique transcranienne répétitive à l’étude de la modulation centrale du fonctionnement cochléaire chez le sujet normo-entendant : Corticofugal modulation of peripheral auditory activity by repetitive transcranial magnetic stimulation of auditory cortex in healthy normal-hearing subjects. [Doctoral Dissertation]. Université Claude Bernard – Lyon I; 2011. Available from: http://www.theses.fr/2011LYO10289

University of South Florida
24.
Leonard, Jenifer.
Effects of Supplemental Magnesium on Temporary Threshold Shift: Distortion Product Otoacoustic Emissions.
Degree: 2003, University of South Florida
URL: https://scholarcommons.usf.edu/etd/1416
► Previous studies have shown that supplemental magnesium administered prior to exposure to noise has an alleviating effect on temporary threshold shift (TTS). These studies have…
(more)
▼ Previous studies have shown that supplemental magnesium administered prior to exposure to noise has an alleviating effect on temporary threshold shift (TTS). These studies have only used audiometric thresholds to demonstrate changes in the auditory system. However, to help determine the effects on outer hair cells (OHCs), a more sensitive measure should be used. The purpose of this study was to determine if supplemental magnesium administration prior to noise exposure has a beneficial effect on acoustic overexposure using a double-blind research design. This was determined by measuring distortion product otoacoustic emissions (DPOAEs) to determine any changes in cochlear OHC function. DPOAE amplitude and signal-to-noise ratio (SNR) measurements were analyzed for two groups of twenty participants (an experimental group and a control group). The experimental group received 150 mg of magnesium gluconate one hour prior to noise exposure. The control group received a placebo pill that was identical in appearance to the magnesium pill. Following noise exposure, the greatest changes in DPOAE amplitude and SNR occurred for the frequencies that were one-half to one octave above the frequency of the stimuli used. The greatest changes in DPOAE measurements were present immediately post TTS-inducing stimulus, with only slight changes present after 30 minutes and no difference between 30 minutes and 60 minutes post-exposure. These results were the same for both groups. It was concluded that this dosage of supplemental magnesium had no apparent protective effect on DPOAEs following intense noise exposure.
Subjects/Keywords: temporary threshold shift; TTS; distortion product otoacoustic emissions; DPOAE; supplemental magnesium; noise induced hearing loss; American Studies; Arts and Humanities
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Leonard, J. (2003). Effects of Supplemental Magnesium on Temporary Threshold Shift: Distortion Product Otoacoustic Emissions. (Thesis). University of South Florida. Retrieved from https://scholarcommons.usf.edu/etd/1416
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Leonard, Jenifer. “Effects of Supplemental Magnesium on Temporary Threshold Shift: Distortion Product Otoacoustic Emissions.” 2003. Thesis, University of South Florida. Accessed December 14, 2019.
https://scholarcommons.usf.edu/etd/1416.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Leonard, Jenifer. “Effects of Supplemental Magnesium on Temporary Threshold Shift: Distortion Product Otoacoustic Emissions.” 2003. Web. 14 Dec 2019.
Vancouver:
Leonard J. Effects of Supplemental Magnesium on Temporary Threshold Shift: Distortion Product Otoacoustic Emissions. [Internet] [Thesis]. University of South Florida; 2003. [cited 2019 Dec 14].
Available from: https://scholarcommons.usf.edu/etd/1416.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Leonard J. Effects of Supplemental Magnesium on Temporary Threshold Shift: Distortion Product Otoacoustic Emissions. [Thesis]. University of South Florida; 2003. Available from: https://scholarcommons.usf.edu/etd/1416
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Ghana
25.
Acquah, R.A.
Prevalence and Risk Factors of Hearing Loss among Pediatric Patients at a Tertiary Teaching Hospital in Accra
.
Degree: 2015, University of Ghana
URL: http://ugspace.ug.edu.gh/handle/123456789/8554
► Background: Hearing loss is the most frequent hearing deficit in both adult and pediatric populations, affecting more than 250 million people in the world. The…
(more)
▼ Background: Hearing loss is the most frequent hearing deficit in both adult and pediatric populations, affecting more than 250 million people in the world. The consequences of hearing impairment are diverse and include severe impairment, often resulting in a reduced ability to communicate, delay in language acquisition, economic and educational disadvantage, social isolation and stigmatization. However, these consequences can be reduced by early detection together with appropriate audiological and speech therapy interventions to enhance speech, language and cognitive development in hearing impaired children.
Aim: This research study was aimed at identifying maternal and infant risk factors predisposing children to hearing loss as well as establishing the prevalence of hearing impairment in children aged 6 months to 10 years in a teaching hospital in Ghana.
Methods: Different audiological test batteries (otoscopy, tympanometry,
otoacoustic emissions, behavioral audiometry) and instrumentation (GSI TYMPSTAR tympanometer, Interacoustics Paediatric PA5 and Interacoustics AD229e audiometers) were utilized to identify risk factors and determine prevalence of hearing loss in pediatric patients presenting for hearing profile evaluations at a tertiary hospital. Behavioral assessments were performed via visual reinforcement audiometry, and play audiometry
Results: Anaemia was the most prevalent (8.3%) maternal condition reported by the mothers during pregnancy. The prevalent infant risk factors to hearing loss were anoxia after delivery (24.0%), admission of infants at NICU for more than two days (22.9%), ear infection (21.9%), and low birth weight (8.9%). Only 6.3% had family histories of hearing loss. Overall, there were less passes (40.1%) than refers (59.9%) in the OAE tests. No significant associations between hearing loss and demographics (age and gender) in both ears as measured by the various test batteries across the test frequencies were found. Significant associations between hearing loss and tympanograms were established in both ears across all frequencies via VRA. On the contrary, no significant association was found between hearing loss and tympanograms by play audiometry test results. The prevalence of hearing loss was relatively higher in the younger (0.5 – 2.5 years) children. Profound hearing loss was generally most prevalent across all frequencies in the various assessments, while mild and severe hearing loss were less prevalent.
Conclusion: Maternal and infant risk factors predisposing children to hearing loss were identified. Degrees of hearing loss were assessed and the associated prevalence was estimated. Non-significant associations between hearing loss and demographics were established using the assessment tools. The need to have a mandatory hearing screening for newborns before discharge from hospitals to ensure early detection and intervention of hearing loss is recommended.
Keywords: Risk factors, hearing loss,
otoacoustic emission, tympanometry, prevalence.
Advisors/Committee Members: Amedofu, G.K (advisor), Anim-Sampong, S (advisor).
Subjects/Keywords: Risk factors;
hearing loss;
otoacoustic emission;
tympanometry;
prevalence
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Acquah, R. A. (2015). Prevalence and Risk Factors of Hearing Loss among Pediatric Patients at a Tertiary Teaching Hospital in Accra
. (Masters Thesis). University of Ghana. Retrieved from http://ugspace.ug.edu.gh/handle/123456789/8554
Chicago Manual of Style (16th Edition):
Acquah, R A. “Prevalence and Risk Factors of Hearing Loss among Pediatric Patients at a Tertiary Teaching Hospital in Accra
.” 2015. Masters Thesis, University of Ghana. Accessed December 14, 2019.
http://ugspace.ug.edu.gh/handle/123456789/8554.
MLA Handbook (7th Edition):
Acquah, R A. “Prevalence and Risk Factors of Hearing Loss among Pediatric Patients at a Tertiary Teaching Hospital in Accra
.” 2015. Web. 14 Dec 2019.
Vancouver:
Acquah RA. Prevalence and Risk Factors of Hearing Loss among Pediatric Patients at a Tertiary Teaching Hospital in Accra
. [Internet] [Masters thesis]. University of Ghana; 2015. [cited 2019 Dec 14].
Available from: http://ugspace.ug.edu.gh/handle/123456789/8554.
Council of Science Editors:
Acquah RA. Prevalence and Risk Factors of Hearing Loss among Pediatric Patients at a Tertiary Teaching Hospital in Accra
. [Masters Thesis]. University of Ghana; 2015. Available from: http://ugspace.ug.edu.gh/handle/123456789/8554

Vanderbilt University
26.
Davis, Tara Colleen.
Subgroup Distortion in Metabelian and Free Nilpotent Groups.
Degree: PhD, Mathematics, 2011, Vanderbilt University
URL: http://etd.library.vanderbilt.edu/available/etd-03222011-131219/
;
► The main result of this dissertation sheds light on subgroup distortion in metabelian and free nilpotent groups. A subgroup of a finitely generated free nilpotent…
(more)
▼ The main result of this dissertation sheds light on subgroup
distortion in metabelian and free nilpotent groups.
A subgroup of a finitely generated free nilpotent group F is undistorted if and only if it is a retract of a subgroup of finite index in F. Also, the effects of subgroup
distortion in the wreath products A wr Z, where
A is finitely generated abelian are studied. It is shown that every finitely generated subgroup of A wr Z has
distortion function equivalent to some polynomial. Moreover, for A infinite, and for any polynomial l
k , there is a 2-generated subgroup of A wr Z having
distortion function equivalent to the given polynomial.
Also a formula for the length of elements in arbitrary wreath
product H wr G shows that the group Z
2 wr Z
2 has distorted subgroups, while the lamplighter group Z
2 wr Z has no distorted (finitely generated) subgroups.
Following the work done by Olshanskii for groups, it is also described, for a given semigroup S, which functions l : S → N can be realized up to equivalence as length functions g ↦→ |g|H by embedding S into a finitely generated semigroup H. Following the work done by Olshanskii and Sapir, a complete description of length functions of a given finitely generated semigroup with enumerable set of relations inside a finitely presented semigroup is provided.
This classification for groups has connections with another function of interest in geometric group theory: the relative growth function. There are connections between the relative growth of cyclic subgroups, and the corresponding
distortion function of the embedding. In particular, when the
distortion is non-recursive, the relative growth is at least almost quadratic. On the other hand, there exists a cyclic subgroup of a two generated group such that the
distortion function associated to the embedding is not bounded above by any recursive function, and yet the relative growth is o(r
2).
Advisors/Committee Members: Guoliang Yu (committee member), Senta Victoria Greene (committee member), Mark Sapir (committee member), Denis Osin (committee member), Alexander Olshanskii (chair).
Subjects/Keywords: membership problem; wreath product; subgroup distortion
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Davis, T. C. (2011). Subgroup Distortion in Metabelian and Free Nilpotent Groups. (Doctoral Dissertation). Vanderbilt University. Retrieved from http://etd.library.vanderbilt.edu/available/etd-03222011-131219/ ;
Chicago Manual of Style (16th Edition):
Davis, Tara Colleen. “Subgroup Distortion in Metabelian and Free Nilpotent Groups.” 2011. Doctoral Dissertation, Vanderbilt University. Accessed December 14, 2019.
http://etd.library.vanderbilt.edu/available/etd-03222011-131219/ ;.
MLA Handbook (7th Edition):
Davis, Tara Colleen. “Subgroup Distortion in Metabelian and Free Nilpotent Groups.” 2011. Web. 14 Dec 2019.
Vancouver:
Davis TC. Subgroup Distortion in Metabelian and Free Nilpotent Groups. [Internet] [Doctoral dissertation]. Vanderbilt University; 2011. [cited 2019 Dec 14].
Available from: http://etd.library.vanderbilt.edu/available/etd-03222011-131219/ ;.
Council of Science Editors:
Davis TC. Subgroup Distortion in Metabelian and Free Nilpotent Groups. [Doctoral Dissertation]. Vanderbilt University; 2011. Available from: http://etd.library.vanderbilt.edu/available/etd-03222011-131219/ ;
27.
Mello, Jaqueline Medeiros de.
Função coclear em frequências ultra-altas em pais de indivíduos com deficiência auditiva autossômica recessiva.
Degree: PhD, Comunicação Humana, 2012, University of São Paulo
URL: http://www.teses.usp.br/teses/disponiveis/5/5162/tde-28012013-110825/
;
► INTRODUÇÃO: Na deficiência auditiva não sindrômica de herança autossômica recessiva, causada por alteração no gene GJB2 (Gap Junction Bet-2 Protein), os pais de indivíduos com…
(more)
▼ INTRODUÇÃO: Na deficiência auditiva não sindrômica de herança autossômica recessiva, causada por alteração no gene GJB2 (Gap Junction Bet-2 Protein), os pais de indivíduos com deficiência auditiva são portadores em heterozigose de um alelo recessivo que causa a surdez, porém, são assintomáticos, mas podem apresentar alterações auditivas precoces e discretas. OBJETIVO: Avaliar a função coclear em pais de indivíduos com deficiência auditiva de herança autossômica recessiva por meio das Emissões Otoacústicas Evocadas Produto de Distorção (EOA-PD) em frequências convencionais e em frequências ultra-altas, comparando as respostas do grupo controle pareadas por gênero e idade. MÉTODO: Foram avaliados 56 indivíduos, entre 20 a 58 anos de idade, divididos em dois grupos, o Grupo Estudo (GE), constituído por 28 pais de deficientes auditivos decorrentes de herança autossômica recessiva, sendo 14 mulheres com idade entre 20 a 55 anos (média 32,8 anos) e 14 homens com idade entre 20 a 58 anos (média 35,2), e o Grupo Controle (GC). formado por indivíduos sem queixa auditiva, composto por 14 homens e 14 mulheres com idades pareadas ao GE. Os indivíduos foram submetidos aos exames de Audiometria Tonal Liminar (ATL), Imitanciometria, incluindo a timpanometria e Reflexo Acústico (RA), e EOA-PD em frequências convencionais e em frequências ultra-altas. RESULTADOS: Não houve diferença estatisticamente significante entre as orelhas e grupos nos achados da ATL e RA, porém, nas respostas de EOA-PD, o GE apresentou diferença estatisticamente significativa em todas as frequências em comparação ao GC. A Correlação de Pearson entre a ATL e as EOA-PD, entre as orelhas e entre os grupos, mostrou correlação negativa entre as orelhas e grupos, indicando que, com o aumento no nível de resposta das EOA-PD, ocorre melhora nos limiares auditivos. A correlação de Pearson entre os resultados dos RA e as EOA-PD não demonstrou correlação significativa para ambos os grupos avaliados. A correlação de Pearson entre a idade e as EOA-PD, em frequências convencionais, mostrou correlação negativa significativa em algumas frequências, entretanto, não houve correlação entre a idade e as EOA-PD em frequências ultra-altas. Foi utilizado o intervalo de referência, diagramas de dispersão e análise discriminante para investigar-se se houve diferença entre as EOA-PD em frequências convencionais e em frequências ultra-altas, sendo que as EOA-PD em frequências convencionais mensuraram com maior precisão os sujeitos do GE, em relação às frequências ultra-altas. CONCLUSÃO: As EOA-PD, tanto para as frequências convencionais, quanto para as frequências ultra-altas, foram capazes de distinguir os indivíduos do GE e do GC, sugerindo que indivíduos heterozigotos para a mutação do gene GJB2 podem apresentar dano no processo ativo das células ciliadas externas antes da manifestação clínica por meio dos resultados alterados na avaliação audiológica convencional.
INTRODUCTION: In nonsyndromic hearing loss of recessive autosomal heritage, caused by changes in the gene GJB2 (Gap…
Advisors/Committee Members: Carvallo, Renata Mota Mamede de.
Subjects/Keywords: Audição; Emissão otoacústica; Genética; Genetics; Hearing; Hearing tests; Mutação; Mutation; Otoacoustic emission; Testes auditivos
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Mello, J. M. d. (2012). Função coclear em frequências ultra-altas em pais de indivíduos com deficiência auditiva autossômica recessiva. (Doctoral Dissertation). University of São Paulo. Retrieved from http://www.teses.usp.br/teses/disponiveis/5/5162/tde-28012013-110825/ ;
Chicago Manual of Style (16th Edition):
Mello, Jaqueline Medeiros de. “Função coclear em frequências ultra-altas em pais de indivíduos com deficiência auditiva autossômica recessiva.” 2012. Doctoral Dissertation, University of São Paulo. Accessed December 14, 2019.
http://www.teses.usp.br/teses/disponiveis/5/5162/tde-28012013-110825/ ;.
MLA Handbook (7th Edition):
Mello, Jaqueline Medeiros de. “Função coclear em frequências ultra-altas em pais de indivíduos com deficiência auditiva autossômica recessiva.” 2012. Web. 14 Dec 2019.
Vancouver:
Mello JMd. Função coclear em frequências ultra-altas em pais de indivíduos com deficiência auditiva autossômica recessiva. [Internet] [Doctoral dissertation]. University of São Paulo; 2012. [cited 2019 Dec 14].
Available from: http://www.teses.usp.br/teses/disponiveis/5/5162/tde-28012013-110825/ ;.
Council of Science Editors:
Mello JMd. Função coclear em frequências ultra-altas em pais de indivíduos com deficiência auditiva autossômica recessiva. [Doctoral Dissertation]. University of São Paulo; 2012. Available from: http://www.teses.usp.br/teses/disponiveis/5/5162/tde-28012013-110825/ ;

Pontifícia Universidade Católica de São Paulo
28.
Luciene da Cruz Fernandes.
Zumbido e audição normal: estudo do reflexo acústico e da supressão das emissões otoacústicas.
Degree: 2007, Pontifícia Universidade Católica de São Paulo
URL: http://www.sapientia.pucsp.br//tde_busca/arquivo.php?codArquivo=5445
► Introduction: The functioning of the auditory pathway of patients with tinnitus complaints and normal hearing can be directly related to a mal-functional in the auditory…
(more)
▼ Introduction: The functioning of the auditory pathway of patients with tinnitus complaints and normal hearing can be directly related to a mal-functional in the auditory efferent pathway, regarding the level of the olivocochlear superior system, in which, the acoustic reflex threshold data and the otoacustic emissions with contralateral noise may represent an alternative to its evaluation. Aim: Investigate the otoacustic emissions suppressions and the contralateral acoustic reflex threshold in adults, with normal hearing and tinnitus complaints. Method: 40 women with ages between 18 and 59 were evaluated. Being 20 women with tinnitus complaints and 20 without tinnitus complaints. An investigation of the contralateral acoustic reflex threshold (AR) in a band of 500, 1000 and 2000 Hz, and one of the suppression of the transitory otoacoustic emissions (TEOAE) with white noise at 50 dBNPS contralaterally was performed. Results: The absence and the presence/increased of the acoustic reflex were present only in the subjects with tinnitus. The average of the presence/normal was higher in all frequencies in both ears and in the group with tinnitus (96.65 dB), compared to the group without tinnitus (90.92 dB). Considering the summing up of the frequencies and the frequency of 2000 Hz in the left ear, there was no difference between the group with and without tinnitus regarding the TEOAE suppression, except in the frequency of 1000 Hz in the left ear in the group with tinnitus. There was no association between the acoustic reflex test and the TEOAE suppression. Conclusion: the evaluation of the efferent system may contribute to the tinnitus topographic diagnosis. However, there is the necessity of more studies, in order to establish the appropriate method and standard values for the tests performance
Introdução: O funcionamento da via auditiva de pacientes com queixa de zumbido e audição normal pode estar diretamente relacionado a uma disfunção da via eferente auditiva, no nível do complexo olivar superior, e o registro do limiar do reflexo acústico e a supressão das emissões otoacústicas com ruído contralateral podem representar uma alternativa para sua avaliação. Objetivo: Investigar a supressão das emissões otoacústicas e o limiar do reflexo acústico contralateral em indivíduos adultos, ouvintes normais e com queixa de zumbido. Método: Foram avaliados 40 sujeitos, do gênero feminino, entre 18 e 59 anos de idade, sendo 20 sem queixa de zumbido e 20 com queixa de zumbido. Foi realizada a pesquisa do limiar do reflexo acústico contralteral (RA) nas freqüências de 500, 1000 e 2000 Hz e a supressão das emissões otoacústicas transientes (EOAT) com ruído branco de 50dBNPS contralateralmente. Resultados: A ausência e a presença/aumentada do reflexo acústico ocorreram apenas nos sujeitos com zumbido. A média da presença/normal apresentou-se superior, em todas as freqüências e em ambas as orelhas, no grupo com zumbido (96.65 dB), comparado ao grupo sem queixa (90.92dB). Na somatória das freqüências e na freqüência de 2000 Hz na…
Advisors/Committee Members: Teresa Maria Momensohm dos Santos.
Subjects/Keywords: Reflexo acústico; FONOAUDIOLOGIA; Acoustic reflex; Tinnitus; Otoacoustic emission; Zumbido; Emissoes otoacusticas; Audicao
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Fernandes, L. d. C. (2007). Zumbido e audição normal: estudo do reflexo acústico e da supressão das emissões otoacústicas. (Thesis). Pontifícia Universidade Católica de São Paulo. Retrieved from http://www.sapientia.pucsp.br//tde_busca/arquivo.php?codArquivo=5445
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Fernandes, Luciene da Cruz. “Zumbido e audição normal: estudo do reflexo acústico e da supressão das emissões otoacústicas.” 2007. Thesis, Pontifícia Universidade Católica de São Paulo. Accessed December 14, 2019.
http://www.sapientia.pucsp.br//tde_busca/arquivo.php?codArquivo=5445.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Fernandes, Luciene da Cruz. “Zumbido e audição normal: estudo do reflexo acústico e da supressão das emissões otoacústicas.” 2007. Web. 14 Dec 2019.
Vancouver:
Fernandes LdC. Zumbido e audição normal: estudo do reflexo acústico e da supressão das emissões otoacústicas. [Internet] [Thesis]. Pontifícia Universidade Católica de São Paulo; 2007. [cited 2019 Dec 14].
Available from: http://www.sapientia.pucsp.br//tde_busca/arquivo.php?codArquivo=5445.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Fernandes LdC. Zumbido e audição normal: estudo do reflexo acústico e da supressão das emissões otoacústicas. [Thesis]. Pontifícia Universidade Católica de São Paulo; 2007. Available from: http://www.sapientia.pucsp.br//tde_busca/arquivo.php?codArquivo=5445
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Vanderbilt University
29.
Spankovich, Christopher.
Early Indices of Auditory Pathology in Young Adults with Type-1 Diabetes.
Degree: PhD, Hearing and Speech Sciences, 2010, Vanderbilt University
URL: http://etd.library.vanderbilt.edu/available/etd-09142010-120712/
;
► This project is concerned with the relationship between type-1 diabetes and auditory pathology. In this dissertation I compared hearing sensitivity, cochlear function, and peripheral auditory…
(more)
▼ This project is concerned with the relationship between type-1 diabetes and auditory pathology. In this dissertation I compared hearing sensitivity, cochlear function, and peripheral auditory neural function (afferent and efferent) in young adults with type-1 diabetes in comparison to matched controls. As a secondary objective I explored the influence of covariates, such as diabetes control, sex, and noise exposure. My findings suggest that the persons with type-1 diabetes demonstrated early signs of cochlear pathology and that this damage was related to sex and history of noise exposure. In addition, I demonstrated the utility of low-level stimulus evoked
otoacoustic emissions in showing reduced cochlear function in participants with higher noise exposure and type-1 diabetes despite otherwise normal auditory function outcomes. Identification and recognition of early indices of cochlear pathology may allow intervention and prevention of noise related hearing loss in persons with and without type-1 diabetes.
Advisors/Committee Members: Daniel H Ashmead (committee member), Benjamin WY Hornsby (committee member), Bill Russell (committee member), Linda J Hood (chair).
Subjects/Keywords: diabetes; auditory; hearing; otoacoustic emission; auditory brainstem response; oae suppression; fine structure
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APA (6th Edition):
Spankovich, C. (2010). Early Indices of Auditory Pathology in Young Adults with Type-1 Diabetes. (Doctoral Dissertation). Vanderbilt University. Retrieved from http://etd.library.vanderbilt.edu/available/etd-09142010-120712/ ;
Chicago Manual of Style (16th Edition):
Spankovich, Christopher. “Early Indices of Auditory Pathology in Young Adults with Type-1 Diabetes.” 2010. Doctoral Dissertation, Vanderbilt University. Accessed December 14, 2019.
http://etd.library.vanderbilt.edu/available/etd-09142010-120712/ ;.
MLA Handbook (7th Edition):
Spankovich, Christopher. “Early Indices of Auditory Pathology in Young Adults with Type-1 Diabetes.” 2010. Web. 14 Dec 2019.
Vancouver:
Spankovich C. Early Indices of Auditory Pathology in Young Adults with Type-1 Diabetes. [Internet] [Doctoral dissertation]. Vanderbilt University; 2010. [cited 2019 Dec 14].
Available from: http://etd.library.vanderbilt.edu/available/etd-09142010-120712/ ;.
Council of Science Editors:
Spankovich C. Early Indices of Auditory Pathology in Young Adults with Type-1 Diabetes. [Doctoral Dissertation]. Vanderbilt University; 2010. Available from: http://etd.library.vanderbilt.edu/available/etd-09142010-120712/ ;

University of Toronto
30.
Wan, Eric.
Automatic Detection of Selective Auditory Attention Via Transient Evoked Otoacoustic Emissions.
Degree: 2013, University of Toronto
URL: http://hdl.handle.net/1807/35701
► Past studies have shown that the effects of selective auditory attention are evident in medial olivocochlear (MOC) activity, manifested as the contralateral suppression (CS) of…
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▼ Past studies have shown that the effects of selective auditory attention are evident in medial olivocochlear (MOC) activity, manifested as the contralateral suppression (CS) of transient evoked otoacoustic emissions (TEOAEs). This finding suggests the use of TEOAEs in the design of an auditory-based access technology as a potential access solution for children with severe disabilities. Thirteen participants with normal hearing threshold and normal middle ear function completed this study. The participants were instrumented with a TEOAE ear probe and presented with a contralateral acoustic stimulus. They were instructed to alternate auditory attention conditions as visually cued by symbols on an LCD display. Attentive and non-attentive conditions were detected with an overall accuracy of 70.17 +/- 12.54% at 2.44 +/- 0.3 bits per minute in a participant-specific classifier, and 65.92 +/- 13.91% in a participant-independent classifier. Detection of auditory attention exceeded random chance levels for 11 of 13 participants.
MAST
Advisors/Committee Members: Chau, Tom, Electrical and Computer Engineering.
Subjects/Keywords: access technology; otoacoustic emission; auditory attention; body-machine interface; TEOAE; 0544; 0541
Record Details
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Record Details
Similar Records
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Wan, E. (2013). Automatic Detection of Selective Auditory Attention Via Transient Evoked Otoacoustic Emissions. (Masters Thesis). University of Toronto. Retrieved from http://hdl.handle.net/1807/35701
Chicago Manual of Style (16th Edition):
Wan, Eric. “Automatic Detection of Selective Auditory Attention Via Transient Evoked Otoacoustic Emissions.” 2013. Masters Thesis, University of Toronto. Accessed December 14, 2019.
http://hdl.handle.net/1807/35701.
MLA Handbook (7th Edition):
Wan, Eric. “Automatic Detection of Selective Auditory Attention Via Transient Evoked Otoacoustic Emissions.” 2013. Web. 14 Dec 2019.
Vancouver:
Wan E. Automatic Detection of Selective Auditory Attention Via Transient Evoked Otoacoustic Emissions. [Internet] [Masters thesis]. University of Toronto; 2013. [cited 2019 Dec 14].
Available from: http://hdl.handle.net/1807/35701.
Council of Science Editors:
Wan E. Automatic Detection of Selective Auditory Attention Via Transient Evoked Otoacoustic Emissions. [Masters Thesis]. University of Toronto; 2013. Available from: http://hdl.handle.net/1807/35701
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