subject:( otoacoustic emission)

University of Ghana

1. 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 (6^th 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 (16^th 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 07, 2019. http://ugspace.ug.edu.gh/handle/123456789/8554.

MLA Handbook (7^th Edition):

Acquah, R A. “Prevalence and Risk Factors of Hearing Loss among Pediatric Patients at a Tertiary Teaching Hospital in Accra .” 2015. Web. 07 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 07]. 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

2. 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/ ;

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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)

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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 (6^th 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 (16^th 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 07, 2019. http://www.teses.usp.br/teses/disponiveis/5/5162/tde-28012013-110825/ ;.

MLA Handbook (7^th Edition):

Mello, Jaqueline Medeiros de. “Função coclear em frequências ultra-altas em pais de indivíduos com deficiência auditiva autossômica recessiva.” 2012. Web. 07 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 07]. 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

3. 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

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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)

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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 (6^th 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 (16^th 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 07, 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 (7^th Edition):

Fernandes, Luciene da Cruz. “Zumbido e audição normal: estudo do reflexo acústico e da supressão das emissões otoacústicas.” 2007. Web. 07 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 07]. 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

4. 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)

Subjects/Keywords: diabetes; auditory; hearing; otoacoustic emission; auditory brainstem response; oae suppression; fine structure

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th 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 (16^th Edition):

Spankovich, Christopher. “Early Indices of Auditory Pathology in Young Adults with Type-1 Diabetes.” 2010. Doctoral Dissertation, Vanderbilt University. Accessed December 07, 2019. http://etd.library.vanderbilt.edu/available/etd-09142010-120712/ ;.

MLA Handbook (7^th Edition):

Spankovich, Christopher. “Early Indices of Auditory Pathology in Young Adults with Type-1 Diabetes.” 2010. Web. 07 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 07]. 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

5. 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

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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… (more)

Subjects/Keywords: access technology; otoacoustic emission; auditory attention; body-machine interface; TEOAE; 0544; 0541

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th 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 (16^th Edition):

Wan, Eric. “Automatic Detection of Selective Auditory Attention Via Transient Evoked Otoacoustic Emissions.” 2013. Masters Thesis, University of Toronto. Accessed December 07, 2019. http://hdl.handle.net/1807/35701.

MLA Handbook (7^th Edition):

Wan, Eric. “Automatic Detection of Selective Auditory Attention Via Transient Evoked Otoacoustic Emissions.” 2013. Web. 07 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 07]. 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

6. Gerenton, Grégory. Mesures non invasives de l'activité electrophysiologique des cellules sensorielles et des neurones auditifs. Applications au diagnostic de pathologies de l'oreille interne. : Noninvasive measurements of the electrophysiological activity of sensory cells and auditory neurons. Applications to the diagnosis of diseases of the inner ear.

Degree: Docteur es, Sciences de la vie et de la sante, 2015, Clermont-Ferrand 1

URL: http://www.theses.fr/2015CLF1MM17

► Grâce à la miniaturisation de la technologie ainsi qu'a l'augmentation constante des capacités de calcul numérique, les méthodes objectives et les appareils de mesures de… (more)

▼ Grâce à la miniaturisation de la technologie ainsi qu'a l'augmentation constante des capacités de calcul numérique, les méthodes objectives et les appareils de mesures de la physiologie auditive évoluent. C'est dans l'optique de créer de nouveaux outils diagnostics que la société Echodia a été créée en 2009. Celle-ci finance aujourd'hui mes recherches sous convention CIFRE.Les présents travaux proposent, dans une première partie, de présenter comment deux méthodes de mesures non invasives ont été mises en oeuvre pour être applicables au diagnostic de l'hydrops cochléaire. Les méthodes sont basées sur le fait que les réponses des cellules ciliées de la cochlée à des stimuli sonores dépendent de la position au repos de leur touffe de stéréocils. Or, l'hydrops cochléaire, l'une des principales caractéristiques de la maladie de Menière, est susceptible de venir perturber cet environnement. Une variation chimique ou mécanique de celui-ci peut ainsi être mise en évidence par différentes méthodes d'exploration objectives. La première est basée sur un enregistrement électrophysiologique. En étudiant le Potentiel de sommation (SP) de l'ÉlectroCochléoGraphie (ECochG), nous allons recueillir une image du tour basal de la cochlée. La deuxième méthode est basée sur un enregistrement acoustique dans le méat acoustique externe. En monitorant le déphasage des Produits de distorsion desoto-émissions acoustiques (DPOAE), nous allons enregistrer les réponses du tour apical de la cochlée.La deuxième partie est consacrée à une étude au cours de laquelle nous avons enregistré de manière concomitante le SP (basal) ainsi que le DPOAE (apical) chez 73 patients souffrant de vertiges de Menière, à proximité d'une attaque (n = 40) ou entre les attaques, sans symptômes cliniques (n = 33). Dans le cas des DPOAE, c'est la phase du produit de distorsion (PDA) à 2*f1-f2 qui a été étudiée en réponse à des sons stimulants de fréquence f1 = 1 kHz et f2 = 1,2 kHz. La puissance des deux fondamentaux a été fixée entre 70 et 75dB SPL en fonction du niveau du DPOAE. Le rapport entre SP et le Potentiel d’action global (AP) a, quant à lui, été mesuré de manière extra-tympanique en réponse à des clics de 95dB nHL. Ces deux mesures ont été effectuées plusieurs fois pendant un test de posture afin d'évaluer leur stabilité.Les limites normales de déphasage du DPOAE en réponse à la posture [-18 °, +38 °] ont été dépassées chez 75% des patients étant venus consulter à proximité d'une crise. Sur ces mêmes sujets, l'étude du ratio entre SP et AP a dépassé la valeur normale (<0,40) dans 60% des cas. De plus, chez les patients à proximité d'une crise de vertige, les deux types de mesures révèlent des fluctuations entre deux répétitions. Ces écarts mettent en évidence combien l'hydrops entrave le bon fonctionnement de la mécanique cochléaire. Le fait de constater des variations sur des échelles de temps aussi courtes pourrait expliquer la sensibilité imparfaite des tests diagnostics. En effet, les protocoles de mesure du SP ou des DPOAE nécessitent un moyennage des… Advisors/Committee Members: Avan, Paul (thesis director).

Subjects/Keywords: Électrocochléographie,; Oto-émissions acoustiques; Physiologie des cellules ciliées,; Hydrops cochléaire; Endocochlear hydrops; Electrocochleography,; Otoacoustic emission; Hair cell physiology; 617.51

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Gerenton, G. (2015). Mesures non invasives de l'activité electrophysiologique des cellules sensorielles et des neurones auditifs. Applications au diagnostic de pathologies de l'oreille interne. : Noninvasive measurements of the electrophysiological activity of sensory cells and auditory neurons. Applications to the diagnosis of diseases of the inner ear. (Doctoral Dissertation). Clermont-Ferrand 1. Retrieved from http://www.theses.fr/2015CLF1MM17

Chicago Manual of Style (16^th Edition):

Gerenton, Grégory. “Mesures non invasives de l'activité electrophysiologique des cellules sensorielles et des neurones auditifs. Applications au diagnostic de pathologies de l'oreille interne. : Noninvasive measurements of the electrophysiological activity of sensory cells and auditory neurons. Applications to the diagnosis of diseases of the inner ear.” 2015. Doctoral Dissertation, Clermont-Ferrand 1. Accessed December 07, 2019. http://www.theses.fr/2015CLF1MM17.

MLA Handbook (7^th Edition):

Gerenton, Grégory. “Mesures non invasives de l'activité electrophysiologique des cellules sensorielles et des neurones auditifs. Applications au diagnostic de pathologies de l'oreille interne. : Noninvasive measurements of the electrophysiological activity of sensory cells and auditory neurons. Applications to the diagnosis of diseases of the inner ear.” 2015. Web. 07 Dec 2019.

Vancouver:

Gerenton G. Mesures non invasives de l'activité electrophysiologique des cellules sensorielles et des neurones auditifs. Applications au diagnostic de pathologies de l'oreille interne. : Noninvasive measurements of the electrophysiological activity of sensory cells and auditory neurons. Applications to the diagnosis of diseases of the inner ear. [Internet] [Doctoral dissertation]. Clermont-Ferrand 1; 2015. [cited 2019 Dec 07]. Available from: http://www.theses.fr/2015CLF1MM17.

Council of Science Editors:

Gerenton G. Mesures non invasives de l'activité electrophysiologique des cellules sensorielles et des neurones auditifs. Applications au diagnostic de pathologies de l'oreille interne. : Noninvasive measurements of the electrophysiological activity of sensory cells and auditory neurons. Applications to the diagnosis of diseases of the inner ear. [Doctoral Dissertation]. Clermont-Ferrand 1; 2015. Available from: http://www.theses.fr/2015CLF1MM17

Miami University

7. Sproat, Brittany Anne. Music Listening Behavior, Health, Hearing, Otoacoustic Emission Levels.

Degree: MA, Speech Pathology and Audiology, 2014, Miami University

URL: http://rave.ohiolink.edu/etdc/view?acc_num=miami1399303027

► The purpose of this study was to examine the relationship between hearing levels, otoacoustic emission levels and listening habits related to the use of portable… (more)

Subjects/Keywords: Audiology; Kinesiology; Speech Therapy; Personal Listening Device; Health-Related Fitness; Noise-Induced Hearing Loss; Music; Otoacoustic Emission Levels

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Sproat, B. A. (2014). Music Listening Behavior, Health, Hearing, Otoacoustic Emission Levels. (Masters Thesis). Miami University. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=miami1399303027

Chicago Manual of Style (16^th Edition):

Sproat, Brittany Anne. “Music Listening Behavior, Health, Hearing, Otoacoustic Emission Levels.” 2014. Masters Thesis, Miami University. Accessed December 07, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=miami1399303027.

MLA Handbook (7^th Edition):

Sproat, Brittany Anne. “Music Listening Behavior, Health, Hearing, Otoacoustic Emission Levels.” 2014. Web. 07 Dec 2019.

Vancouver:

Sproat BA. Music Listening Behavior, Health, Hearing, Otoacoustic Emission Levels. [Internet] [Masters thesis]. Miami University; 2014. [cited 2019 Dec 07]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=miami1399303027.

Council of Science Editors:

Sproat BA. Music Listening Behavior, Health, Hearing, Otoacoustic Emission Levels. [Masters Thesis]. Miami University; 2014. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=miami1399303027

University of Ottawa

8. Doorsian, Mona. The Effect of Iron Status during Pregnancy on Hearing Functions in the Newborn.

Degree: 2017, University of Ottawa

URL: http://hdl.handle.net/10393/36486

► Background: Iron deficiency, anemia, and iron excess have been associated with altered hearing functions in children and adults. Animal studies suggest that iron deficiency during… (more)

Subjects/Keywords: Otoacoustic Emission (OAE); Auditory Brainstem Responses (ABR); Iron Deficiency Anemia (IDA); Hemoglobin (Hb); Mean Corpuscular Volume (MCV); Hematocrit (HCT)

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Doorsian, M. (2017). The Effect of Iron Status during Pregnancy on Hearing Functions in the Newborn. (Thesis). University of Ottawa. Retrieved from http://hdl.handle.net/10393/36486

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Doorsian, Mona. “The Effect of Iron Status during Pregnancy on Hearing Functions in the Newborn. ” 2017. Thesis, University of Ottawa. Accessed December 07, 2019. http://hdl.handle.net/10393/36486.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Doorsian, Mona. “The Effect of Iron Status during Pregnancy on Hearing Functions in the Newborn. ” 2017. Web. 07 Dec 2019.

Vancouver:

Doorsian M. The Effect of Iron Status during Pregnancy on Hearing Functions in the Newborn. [Internet] [Thesis]. University of Ottawa; 2017. [cited 2019 Dec 07]. Available from: http://hdl.handle.net/10393/36486.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Doorsian M. The Effect of Iron Status during Pregnancy on Hearing Functions in the Newborn. [Thesis]. University of Ottawa; 2017. Available from: http://hdl.handle.net/10393/36486

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Universidade de Brasília

9. 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)

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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 · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th 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 (16^th 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 07, 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 (7^th 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. 07 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 07]. 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

Pontifícia Universidade Católica de São Paulo

10. Cristiane Bolzachini Santoni. Pop-rock musicians: effects of amplified music and assessment of satisfaction provided by the use hearing protectors.

Degree: 2008, Pontifícia Universidade Católica de São Paulo

URL: http://www.sapientia.pucsp.br//tde_busca/arquivo.php?codArquivo=6077

►

Objetivo: Avaliar a audição e o uso de protetores auditivos em músicos de bandas de pop-rock. Justificativa: Estudos demonstram evidências dos músicos de pop-rock apresentarem… (more)

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Objetivo: Avaliar a audição e o uso de protetores auditivos em músicos de bandas de pop-rock. Justificativa: Estudos demonstram evidências dos músicos de pop-rock apresentarem risco para o desenvolvimento de perda auditiva e outros efeitos associados à exposição à música amplificada, bem como a necessidade de adotar medidas de proteção à audição desses profissionais. Método: Foram avaliados 24 músicos de pop-rock, do sexo masculino, com idades entre 25 e 45 anos e com tempo de profissão entre três e 21 anos. Os sujeitos responderam a uma anamnese, realizaram avaliação audiométrica, realizaram os testes de emissões otoacústicas evocadas por estímulo transiente (EOAET) e emissões otoacústicas produto de distorção (EOAPD) e preencheram um questionário sobre a satisfação após o uso do protetor auditivo. Resultados: A prevalência de perdas auditivas sugestivas de PAIR foi de 20,8%. Dentre os audiogramas classificados como normais 58,4% apresentaram entalhe audiométrico em pelo menos uma orelha. No teste de emissões otoacústicas, 45,8% dos músicos tiveram respostas ausentes nas EOAET e 58,4% nas EOAPD. 75,0% dos músicos forneceram nota maior do que 7,0 para refletir sua satisfação no uso do protetor auditivo. Conclusões: Tanto a prevalência de perdas auditivas, quanto o número de ausências nos testes de EOAET e EOAPD foram elevados. Assim sendo, é necessária a implementação de um programa de prevenção de perdas auditivas com músicos. Houve uma tendência favorável à aceitação do protetor auditivo

Purpose: The aim of the present study was to evaluate hearing and assess the satisfaction provided by the use hearing protectors in pop-rock musicians. Background: Studies have shown evidences of the risk of pop-rock musicians to develop hearing loss and other symptoms related to amplified music, as well as to adopt preventive measurements to protect their hearing. Method: It was evaluated 24 pop-rock musicians, male gender and ages between 25 to 45 years old, with professional experience between 3 to 21 years. It was accomplished: anamnesis, audiometric evaluation, transient otoacoustic emission (TEOAE), distortion product otoacoustic emission (DPOAE) and also was applied an ear protective devices satisfaction assessment questionnaire. Results: The prevalence of noise-induced hearing loss was 20.8%. In normal audiograms, there was a notch in high-frequencies in 58.4%, in at least one ear. The responses of TEOAEs were absent in 45.8% of the musicians and DPOAEs were absent in 58.4%. Concerning to satisfaction with the ear protective devices usage, 75.0% of the musicians evaluated them above grade 7.0. Conclusions: There was a high prevalence of hearing losses as well as alterations in TEOAEs and DPOAEs responses. Therefore, it is fundamental to develop and implement hearing loss preventive programs for musicians. There was a positive tendency towards the use of the ear protective devices

Advisors/Committee Members: Ana Claudia Fiorini.

Subjects/Keywords: Perda auditiva provocada por ruido; Ear protective devices; Music; FONOAUDIOLOGIA; Emissoes otoacusticas espontaneas; Dispositivos de proteção das orelhas; Noise induced hearing loss; Música; Spontaneous otoacoustic emission

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Santoni, C. B. (2008). Pop-rock musicians: effects of amplified music and assessment of satisfaction provided by the use hearing protectors. (Thesis). Pontifícia Universidade Católica de São Paulo. Retrieved from http://www.sapientia.pucsp.br//tde_busca/arquivo.php?codArquivo=6077

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Santoni, Cristiane Bolzachini. “Pop-rock musicians: effects of amplified music and assessment of satisfaction provided by the use hearing protectors.” 2008. Thesis, Pontifícia Universidade Católica de São Paulo. Accessed December 07, 2019. http://www.sapientia.pucsp.br//tde_busca/arquivo.php?codArquivo=6077.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Santoni, Cristiane Bolzachini. “Pop-rock musicians: effects of amplified music and assessment of satisfaction provided by the use hearing protectors.” 2008. Web. 07 Dec 2019.

Vancouver:

Santoni CB. Pop-rock musicians: effects of amplified music and assessment of satisfaction provided by the use hearing protectors. [Internet] [Thesis]. Pontifícia Universidade Católica de São Paulo; 2008. [cited 2019 Dec 07]. Available from: http://www.sapientia.pucsp.br//tde_busca/arquivo.php?codArquivo=6077.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Santoni CB. Pop-rock musicians: effects of amplified music and assessment of satisfaction provided by the use hearing protectors. [Thesis]. Pontifícia Universidade Católica de São Paulo; 2008. Available from: http://www.sapientia.pucsp.br//tde_busca/arquivo.php?codArquivo=6077

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Pretoria

11. Kriek, Frances. A hearing screening programme for infants from a neonatal intensive care unit in a South African provincial hospital.

Degree: MComm Path, Speech-Language Pathology and Audiology, 2008, University of Pretoria

URL: http://hdl.handle.net/2263/24137

► The field of early detection and intervention of hearing loss in neonates and infants has been marked by a growing international body of research investigating… (more)

▼ The field of early detection and intervention of hearing loss in neonates and infants has been marked by a growing international body of research investigating hearing screening programmes, protocols and outcomes of early detection for hearing loss. In South Africa, screening for neonates and infants in general and particularly for hearing loss is not common practice and is not meeting the needs of the South African population, with very few infants identified with hearing loss early in life. The Year 2002 Hearing Screening Position Statement recommends an intermediate step toward universal screening in the form of Targeted Newborn Hearing Screening (TNHS) as an option for developing countries with limited resources. The Neonatal Intensive Care Unit (NICU) provides a starting point for TNHS because it encompasses a number of risk factors for hearing loss. A combined descriptive and exploratory research methodology was followed to provide a comprehensive perspective on longitudinal hearing screening for NICU neonates and infants at a provincial hospital in South Africa. The quantitative methods included a structured interview to compile risk factor information. Immittance measurements used included acoustic reflex measurements, 226 Hz and 1000 Hz tympanometry. Automated Otoacoustic Emission (AOAE) as well as Automated Auditory Brainstem Response (AABR) screening was conducted. Routine follow-up visits at three month intervals were booked if a subject passed the screen and a follow-up screening for further testing was booked if a subject referred the screening. A total of 49 neonates and infants as well as mothers were enrolled in the first year and followed up for the second year of data collection period. The results indicated that the NICU had potential as platform for TNHS in South Africa. The high incidence of risk factors reported is more when compared with developed countries and highlights the importance of hearing screening in the at risk population for a developing country. The results confirmed reports that 226 Hz probe tone tympanometry produces erroneous responses in young infants. A high correspondence between high frequency tympanometry and AOAE results was found and underlines the need for differential diagnosis to accurately detect middle ear effusion and/or sensorineural hearing loss in neonates and infants. The unilateral AOAE refer rate (7%) was within range of the reported values for initial screening at discharge from the NICU. AABR results indicated a relatively high unilateral refer result (24%) and may be attributed to irritability and restlessness. The highest referral rates in the current study were recorded during the second and third visit and may be attributed to the presence of middle-ear pathology in older infants. The perceptions of mothers emphasized the lack of awareness regarding hearing and hearing loss in South Africa. Lack of knowledge may be a contributing actor to poor compliance with screening follow-up. Despite prevailing challenges, such as a low follow-up return rate, lack… Advisors/Committee Members: Swanepoel, De Wet (advisor), Pottas, Lidia (advisor).

Subjects/Keywords: Neonatal intensive care unit; Immittance measurements; Parental perceptions; Otoacoustic emission; Risk factors; Targeted neonatal hearing screening; Electrophysiology; Intervention; Auditory brainstem response; Early hearing detection; UCTD

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Kriek, F. (2008). A hearing screening programme for infants from a neonatal intensive care unit in a South African provincial hospital. (Masters Thesis). University of Pretoria. Retrieved from http://hdl.handle.net/2263/24137

Chicago Manual of Style (16^th Edition):

Kriek, Frances. “A hearing screening programme for infants from a neonatal intensive care unit in a South African provincial hospital.” 2008. Masters Thesis, University of Pretoria. Accessed December 07, 2019. http://hdl.handle.net/2263/24137.

MLA Handbook (7^th Edition):

Kriek, Frances. “A hearing screening programme for infants from a neonatal intensive care unit in a South African provincial hospital.” 2008. Web. 07 Dec 2019.

Vancouver:

Kriek F. A hearing screening programme for infants from a neonatal intensive care unit in a South African provincial hospital. [Internet] [Masters thesis]. University of Pretoria; 2008. [cited 2019 Dec 07]. Available from: http://hdl.handle.net/2263/24137.

Council of Science Editors:

Kriek F. A hearing screening programme for infants from a neonatal intensive care unit in a South African provincial hospital. [Masters Thesis]. University of Pretoria; 2008. Available from: http://hdl.handle.net/2263/24137

University of Pretoria

12. [No author]. A hearing screening programme for infants from a neonatal intensive care unit in a South African provincial hospital .

Degree: 2008, University of Pretoria

URL: http://upetd.up.ac.za/thesis/available/etd-04252008-110642/

► The field of early detection and intervention of hearing loss in neonates and infants has been marked by a growing international body of research investigating… (more)

▼ The field of early detection and intervention of hearing loss in neonates and infants has been marked by a growing international body of research investigating hearing screening programmes, protocols and outcomes of early detection for hearing loss. In South Africa, screening for neonates and infants in general and particularly for hearing loss is not common practice and is not meeting the needs of the South African population, with very few infants identified with hearing loss early in life. The Year 2002 Hearing Screening Position Statement recommends an intermediate step toward universal screening in the form of Targeted Newborn Hearing Screening (TNHS) as an option for developing countries with limited resources. The Neonatal Intensive Care Unit (NICU) provides a starting point for TNHS because it encompasses a number of risk factors for hearing loss. A combined descriptive and exploratory research methodology was followed to provide a comprehensive perspective on longitudinal hearing screening for NICU neonates and infants at a provincial hospital in South Africa. The quantitative methods included a structured interview to compile risk factor information. Immittance measurements used included acoustic reflex measurements, 226 Hz and 1000 Hz tympanometry. Automated Otoacoustic Emission (AOAE) as well as Automated Auditory Brainstem Response (AABR) screening was conducted. Routine follow-up visits at three month intervals were booked if a subject passed the screen and a follow-up screening for further testing was booked if a subject referred the screening. A total of 49 neonates and infants as well as mothers were enrolled in the first year and followed up for the second year of data collection period. The results indicated that the NICU had potential as platform for TNHS in South Africa. The high incidence of risk factors reported is more when compared with developed countries and highlights the importance of hearing screening in the at risk population for a developing country. The results confirmed reports that 226 Hz probe tone tympanometry produces erroneous responses in young infants. A high correspondence between high frequency tympanometry and AOAE results was found and underlines the need for differential diagnosis to accurately detect middle ear effusion and/or sensorineural hearing loss in neonates and infants. The unilateral AOAE refer rate (7%) was within range of the reported values for initial screening at discharge from the NICU. AABR results indicated a relatively high unilateral refer result (24%) and may be attributed to irritability and restlessness. The highest referral rates in the current study were recorded during the second and third visit and may be attributed to the presence of middle-ear pathology in older infants. The perceptions of mothers emphasized the lack of awareness regarding hearing and hearing loss in South Africa. Lack of knowledge may be a contributing actor to poor compliance with screening follow-up. Despite prevailing challenges, such as a low follow-up return rate, lack… Advisors/Committee Members: Swanepoel, De Wet (advisor), Pottas, Lidia (advisor).

Subjects/Keywords: Neonatal intensive care unit; Immittance measurements; Parental perceptions; Otoacoustic emission; Risk factors; Targeted neonatal hearing screening; Electrophysiology; Intervention; Auditory brainstem response; Early hearing detection; UCTD

Record Details Similar Records Cite « Share

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

author], [. (2008). A hearing screening programme for infants from a neonatal intensive care unit in a South African provincial hospital . (Masters Thesis). University of Pretoria. Retrieved from http://upetd.up.ac.za/thesis/available/etd-04252008-110642/

Chicago Manual of Style (16^th Edition):

author], [No. “A hearing screening programme for infants from a neonatal intensive care unit in a South African provincial hospital .” 2008. Masters Thesis, University of Pretoria. Accessed December 07, 2019. http://upetd.up.ac.za/thesis/available/etd-04252008-110642/.

MLA Handbook (7^th Edition):

author], [No. “A hearing screening programme for infants from a neonatal intensive care unit in a South African provincial hospital .” 2008. Web. 07 Dec 2019.

Vancouver:

author] [. A hearing screening programme for infants from a neonatal intensive care unit in a South African provincial hospital . [Internet] [Masters thesis]. University of Pretoria; 2008. [cited 2019 Dec 07]. Available from: http://upetd.up.ac.za/thesis/available/etd-04252008-110642/.

Council of Science Editors:

author] [. A hearing screening programme for infants from a neonatal intensive care unit in a South African provincial hospital . [Masters Thesis]. University of Pretoria; 2008. Available from: http://upetd.up.ac.za/thesis/available/etd-04252008-110642/

13. Monteiro, Daniela Alexandra Ferreira. A importância das otoemissões acústicas num programa de conservação de audição em trabalhadores expostos ao ruído.

Degree: 2013, Repositório Científico do Instituto Politécnico de Lisboa

URL: http://www.rcaap.pt/detail.jsp?id=oai:repositorio.ipl.pt:10400.21/3883

►

Mestrado em Segurança e Higiene no Trabalho

A existência de ruído em ambientes industriais é, hoje em dia, uma realidade que se torna cada vez… (more)

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Mestrado em Segurança e Higiene no Trabalho

A existência de ruído em ambientes industriais é, hoje em dia, uma realidade que se torna cada vez mais evidente. Apesar disso, também já existe maior consciência dos efeitos que o ruído tem sobre o trabalhador e ao longo dos tempos tem-se vindo a atuar na sua prevenção. Contudo, a perda de audição provocada pela exposição ao ruído continua a ser uma das principais consequências dos ambientes industriais ruidosos. A finalidade deste estudo é verificar se as otoemissões acústicas detetam alterações na cóclea antes de se detetarem alterações no audiograma tonal simples em trabalhadores expostos ao ruído. Para que se demonstre a importância da inclusão das otoemissões acústicas nos programas de conservação da audição, demonstrando assim serem também uma mais-valia. Este estudo será desenvolvido numa empresa em que os trabalhadores estão expostos a um LEX,8h de 95 dB(A) e um LCpico de 128,8 dB(C) nos vários postos de trabalho. Neste projecto foi aplicado o pré-teste realizando-se o audiograma tonal simples e as otoemissões acústicas por produtos de distorção a dois trabalhadores. Acabada a pesquisa desenvolvida, verifica-se que as otoemissões acústicas têm um potencial interessante para poderem vir a ser usadas num programa de conservação da audição, com o objetivo da deteção precoce de alterações na cóclea em trabalhadores expostos ao ruído.

ABSTRACT - The existence of noise in industrial environments is a reality that becomes increasingly evident in the present days; however, today there is also a bigger awareness of the effects noise has on the worker and, throughout time, efforts have been made to prevent its occurrence. However, even so, the hearing loss caused by exposure to noise is still one of its main consequences. The purpose of this study is to verify if otoacoustic emissions are able to detect changes in the cochlea before any changes are reflected on the pure tone audiogram performed on workers exposed to noise. This is done in order to demonstrate the importance of the inclusion of otoacoustic emissions in the hearing conservation programs, showing their importance. This study will be developed in a company where workers are exposed to a LEX,8h of 95 dB (A) and to a Lcpico of 128,8 dB (C) in the various work positions. In this project, a pre-test was applied, with a pure tone audiogram and distortion product otoacoustic emissions being performed on two workers. At the end of the research, it is possible to verify that otoacoustic emissions have an interesting potential of being used in a hearing conservation program, with the purpose of doing early detection of changes in the cochlea of workers exposed to noise.

Advisors/Committee Members: Arezes, Pedro Miguel, Almeida, João Nuno Freitas de.

Subjects/Keywords: Saúde ocupacional; Segurança no trabalho; Exposição ocupacional; Ruído; Otoemissão acústica; Audição; Audiograma; Occupational health; Occupational safety; Occupational exposure; Noise; Otoacoustic emission; Hearing; Audiogram

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Monteiro, D. A. F. (2013). A importância das otoemissões acústicas num programa de conservação de audição em trabalhadores expostos ao ruído. (Thesis). Repositório Científico do Instituto Politécnico de Lisboa. Retrieved from http://www.rcaap.pt/detail.jsp?id=oai:repositorio.ipl.pt:10400.21/3883

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Monteiro, Daniela Alexandra Ferreira. “A importância das otoemissões acústicas num programa de conservação de audição em trabalhadores expostos ao ruído.” 2013. Thesis, Repositório Científico do Instituto Politécnico de Lisboa. Accessed December 07, 2019. http://www.rcaap.pt/detail.jsp?id=oai:repositorio.ipl.pt:10400.21/3883.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Monteiro, Daniela Alexandra Ferreira. “A importância das otoemissões acústicas num programa de conservação de audição em trabalhadores expostos ao ruído.” 2013. Web. 07 Dec 2019.

Vancouver:

Monteiro DAF. A importância das otoemissões acústicas num programa de conservação de audição em trabalhadores expostos ao ruído. [Internet] [Thesis]. Repositório Científico do Instituto Politécnico de Lisboa; 2013. [cited 2019 Dec 07]. Available from: http://www.rcaap.pt/detail.jsp?id=oai:repositorio.ipl.pt:10400.21/3883.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Monteiro DAF. A importância das otoemissões acústicas num programa de conservação de audição em trabalhadores expostos ao ruído. [Thesis]. Repositório Científico do Instituto Politécnico de Lisboa; 2013. Available from: http://www.rcaap.pt/detail.jsp?id=oai:repositorio.ipl.pt:10400.21/3883

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

14. 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 (6^th 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 (16^th 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 07, 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 (7^th Edition):

Moukos, Antonios. “Συμβολή στην μελέτη της βαρηκοΐας από θόρυβο με σύγχρονες ακοολογικές μεθόδους.” 2014. Web. 07 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 07]. 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

15. Clark, Adele Laura. Otoacoustic emission testing in the early identification of noise-induced hearing loss in South African mineworkers.

Degree: Speech-Language Pathology and Audiology, 2006, University of Pretoria

URL: http://hdl.handle.net/2263/28801

► This study assessed the role of otoacoustic emission screening for the early identification of noise-induced hearing loss in South African mineworkers. Transient otoacoustic emissions and… (more)

Subjects/Keywords: Specificity; Noise exposure; Sensitivity; Noise-induced hearing loss (nihl); Otoacoustic emission (OAE); UCTD

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Clark, A. L. (2006). Otoacoustic emission testing in the early identification of noise-induced hearing loss in South African mineworkers. (Masters Thesis). University of Pretoria. Retrieved from http://hdl.handle.net/2263/28801

Chicago Manual of Style (16^th Edition):

Clark, Adele Laura. “Otoacoustic emission testing in the early identification of noise-induced hearing loss in South African mineworkers.” 2006. Masters Thesis, University of Pretoria. Accessed December 07, 2019. http://hdl.handle.net/2263/28801.

MLA Handbook (7^th Edition):

Clark, Adele Laura. “Otoacoustic emission testing in the early identification of noise-induced hearing loss in South African mineworkers.” 2006. Web. 07 Dec 2019.

Vancouver:

Clark AL. Otoacoustic emission testing in the early identification of noise-induced hearing loss in South African mineworkers. [Internet] [Masters thesis]. University of Pretoria; 2006. [cited 2019 Dec 07]. Available from: http://hdl.handle.net/2263/28801.

Council of Science Editors:

Clark AL. Otoacoustic emission testing in the early identification of noise-induced hearing loss in South African mineworkers. [Masters Thesis]. University of Pretoria; 2006. Available from: http://hdl.handle.net/2263/28801

University of Pretoria

16. 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 (6^th 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 (16^th 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 07, 2019. http://hdl.handle.net/2263/26810.

MLA Handbook (7^th 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. 07 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 07]. 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

17. Jacobs, Peter Gordon. Inference of physiologic processes using otoacoustic emissions.

Degree: PhD, 2010, Oregon Health Sciences University

URL: doi:10.6083/M4HT2M90 ; http://digitalcommons.ohsu.edu/etd/646

Subjects/Keywords: Acoustic emission; Efferent pathways; Aging; Blood sugar monitoring; Medial Olivocochlear; Auditory Attention; Otoacoustic Emissions, Spontaneous; Efferent Pathways; Aging; Blood Glucose

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Jacobs, P. G. (2010). Inference of physiologic processes using otoacoustic emissions. (Doctoral Dissertation). Oregon Health Sciences University. Retrieved from doi:10.6083/M4HT2M90 ; http://digitalcommons.ohsu.edu/etd/646

Chicago Manual of Style (16^th Edition):

Jacobs, Peter Gordon. “Inference of physiologic processes using otoacoustic emissions.” 2010. Doctoral Dissertation, Oregon Health Sciences University. Accessed December 07, 2019. doi:10.6083/M4HT2M90 ; http://digitalcommons.ohsu.edu/etd/646.

MLA Handbook (7^th Edition):

Jacobs, Peter Gordon. “Inference of physiologic processes using otoacoustic emissions.” 2010. Web. 07 Dec 2019.

Vancouver:

Jacobs PG. Inference of physiologic processes using otoacoustic emissions. [Internet] [Doctoral dissertation]. Oregon Health Sciences University; 2010. [cited 2019 Dec 07]. Available from: doi:10.6083/M4HT2M90 ; http://digitalcommons.ohsu.edu/etd/646.

Council of Science Editors:

Jacobs PG. Inference of physiologic processes using otoacoustic emissions. [Doctoral Dissertation]. Oregon Health Sciences University; 2010. Available from: doi:10.6083/M4HT2M90 ; http://digitalcommons.ohsu.edu/etd/646

East Carolina University

18. Caldwell, Kelly A. Speech in noise ability, outer hair cell function, and working memory for trained flute players.

Degree: 2015, East Carolina University

URL: http://hdl.handle.net/10342/4920

► The process of auditory speech recognition requires verbal ability, working memory, recall, and adequate auditory abilities to recognize speech. There is a well-known positive effect… (more)

Subjects/Keywords: Audiology; Speech Therapy; Neuroscience; Auditory processing; Cognitive processing; Outer hair cells; Speech in noise; Working Memory; Speech Perception – physiology; Noise; Auditory Pathways – physiology; Memory, Short-Term – physiology; Perceptual Masking; Pitch Discrimination; Speech Reception Threshold Test; Otoacoustic Emission, Spontaneous; Music

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Caldwell, K. A. (2015). Speech in noise ability, outer hair cell function, and working memory for trained flute players. (Thesis). East Carolina University. Retrieved from http://hdl.handle.net/10342/4920

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Caldwell, Kelly A. “Speech in noise ability, outer hair cell function, and working memory for trained flute players.” 2015. Thesis, East Carolina University. Accessed December 07, 2019. http://hdl.handle.net/10342/4920.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Caldwell, Kelly A. “Speech in noise ability, outer hair cell function, and working memory for trained flute players.” 2015. Web. 07 Dec 2019.

Vancouver:

Caldwell KA. Speech in noise ability, outer hair cell function, and working memory for trained flute players. [Internet] [Thesis]. East Carolina University; 2015. [cited 2019 Dec 07]. Available from: http://hdl.handle.net/10342/4920.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Caldwell KA. Speech in noise ability, outer hair cell function, and working memory for trained flute players. [Thesis]. East Carolina University; 2015. Available from: http://hdl.handle.net/10342/4920

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Western Ontario

19. Boothalingam, Sriram. Role of The Cochlea and Efferent System in Children with Auditory Processing Disorder.

Degree: 2014, University of Western Ontario

URL: https://ir.lib.uwo.ca/etd/2235

► Auditory processing disorder (APD) is characterized by difficulty listening in noisy environments despite normal hearing thresholds. APD was previously thought to be restricted to deficits… (more)

▼ Auditory processing disorder (APD) is characterized by difficulty listening in noisy environments despite normal hearing thresholds. APD was previously thought to be restricted to deficits in the central auditory system. The current work sought to investigate brainstem and peripheral mechanisms that may contribute to difficulties in speech understanding in noise in children with suspected APD (sAPD). Three mechanisms in particular were investigated: cochlear tuning, efferent function, and spatial hearing. Cochlear tuning was measured using stimulus frequency otoacoustic emission (SFOAE) group delay. Results indicate that children suspected with APD have atypically sharp cochlear tuning, and reduced medial olivocochlear (MOC) functioning. Sharper-than-typical cochlear tuning may lead to increased forward masking. On the contrary, binaural efferent function probed with a forward masked click evoked OAE (CEOAE) paradigm indicated that MOC function was not different in typically developing (TD) children and children suspected with APD. A third study with multiple OAE types sought to address this contradiction. Despite numerically smaller MOC inhibition in the sAPD group, MOC function was not significantly different between the two groups. Finally, spatial release from masking, localization-in-noise and interaural time difference thresholds were compared in TD and children with sAPD. Results indicate no significant difference in spatial hearing abilities between the two groups. Non-significant findings at group level in these studies may be related to the large heterogeneity in problems associated with APD. Fragmentation of APD into deficit specific disorders may facilitate research in identification of the specific anatomical underpinnings to listening problems in APD. Prior to conducting studies in children, three studies were conducted to optimize stimulus characteristics. Results of these studies indicate that the MOC may not be especially sensitive to 100 Hz amplitude modulation, as previously reported. Click stimulus presentation rates >25 Hz activate the ipsilateral MOC reflex in typical MOC assays, contaminating contralateral MOC inhibition of CEOAEs. Finally, localization-in-noise abilities of TD children are on par with adults for a white noise masker, but not for speech-babble. This finding suggests that despite maturation of physiological mechanisms required to localize in noise, non-auditory factors may restrict the ability of children in processing complex signals.

Subjects/Keywords: Auditory processing disorder; otoacoustic emission; medial olivocochlear; cochlear tuning; localization; spatial hearing; spatial release from masking; interaural time difference; amplitude modulation; click rate; Speech and Hearing Science; Speech Pathology and Audiology

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Boothalingam, S. (2014). Role of The Cochlea and Efferent System in Children with Auditory Processing Disorder. (Thesis). University of Western Ontario. Retrieved from https://ir.lib.uwo.ca/etd/2235

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Boothalingam, Sriram. “Role of The Cochlea and Efferent System in Children with Auditory Processing Disorder.” 2014. Thesis, University of Western Ontario. Accessed December 07, 2019. https://ir.lib.uwo.ca/etd/2235.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Boothalingam, Sriram. “Role of The Cochlea and Efferent System in Children with Auditory Processing Disorder.” 2014. Web. 07 Dec 2019.

Vancouver:

Boothalingam S. Role of The Cochlea and Efferent System in Children with Auditory Processing Disorder. [Internet] [Thesis]. University of Western Ontario; 2014. [cited 2019 Dec 07]. Available from: https://ir.lib.uwo.ca/etd/2235.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Boothalingam S. Role of The Cochlea and Efferent System in Children with Auditory Processing Disorder. [Thesis]. University of Western Ontario; 2014. Available from: https://ir.lib.uwo.ca/etd/2235

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

20. 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

…x28;1997) found that otoacoustic emission screening failures correlated with the partial or… …Distortion product otoacoustic emission data were recorded as the response - the noise floor in… …Criterion for pass or fail for most otoacoustic emission screening equipment was originally based… …x28;AABR), otoacoustic emissions (OAE), or automated OAE testing are used to… …correlate with initial distortion product otoacoustic emissions (DPOAE) testing outcomes…

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th 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 (16^th Edition):

Ramachandran, Virginia. “Longitudinal outcomes of distortion product otoacoustic emissions and wideband reflectance in infants.” 2012. Doctoral Dissertation, Wayne State University. Accessed December 07, 2019. https://digitalcommons.wayne.edu/oa_dissertations/581.

MLA Handbook (7^th Edition):

Ramachandran, Virginia. “Longitudinal outcomes of distortion product otoacoustic emissions and wideband reflectance in infants.” 2012. Web. 07 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 07]. 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

21. 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

…frequencies using pure tone audiometry and with lower transient otoacoustic emission (TEOAE… …for PCBs in our lab using distortion product otoacoustic emissions (DPOAEs), which… …x29;. Perinatal exposure to Aroclor 1254 impairs distortion product otoacoustic emissions…

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APA (6^th 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 (16^th 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 07, 2019. http://hdl.handle.net/2142/34355.

MLA Handbook (7^th Edition):

Poon, Emily. “Interactive effects of developmental PCB exposure and relevant environmental risks on the auditory system.” 2012. Web. 07 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 07]. 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

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