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You searched for subject:(Acoustic Shadowing). One record found.

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NSYSU

1. Su , Po-chia. Using Perforated plate Structures to Realize the Wave Invisible Effect of Acoustic Cloak.

Degree: Master, Mechanical and Electro-Mechanical Engineering, 2015, NSYSU

The acoustic cloak controls sound waves and it has ability to curve and twist sound waves as well. When sound waves pass through the acoustic cloak, it will be curved and surround in acoustic cloak, moreover, the sound waves avoid contents on the inside. Let the sound waves misunderstand there is no object exist. This study elaborates on acoustic cloak model which is designed by perforated plastic plates. Utilizing the different perforation diameters of plastic plate structural units to change the effective acoustic impedance value and the anisotropic medium is constructed to establish the acoustic cloak model. The study concerns on two experiments. The purpose of the first experiment validates that whether the acoustic cloak has covering effect toward the acoustic field. The experimental results and the theoretical solutions not only describe the same tendency but suggests the feasibility of the acoustic cloak. On the other hand, the second experiment explores energy dissipation of acoustic cloak. It is concluded that most of the energy of positions have merely change when install the acoustic cloak. Therefore, this experiment confirms that if the acoustic cloak device can be use as military equipment to achieve stealth at the specific frequency. The acoustic cloak model was experimented in semi-anechoic chamber. Based on the actual acoustic field measurement not only to validate the observation of acoustic shadowing but to evaluate the acoustic cloak shadowing effect and the feasibility of design concept, so that there are practical applications on acoustic shadowing research, development and production in the future. Advisors/Committee Members: Bor-Tsuen Wang (chair), Yi-Cheng Huang (chair), Jyin-Wen Cheng (chair), Shao-Yi Hsia (chair), Shiuh-Kuang Yang (committee member).

Subjects/Keywords: Perforated Plastic Plate; Acoustic Shadowing; Acoustic Cloak

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

APA (6th Edition):

Su , P. (2015). Using Perforated plate Structures to Realize the Wave Invisible Effect of Acoustic Cloak. (Thesis). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0526115-161822

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

Chicago Manual of Style (16th Edition):

Su , Po-chia. “Using Perforated plate Structures to Realize the Wave Invisible Effect of Acoustic Cloak.” 2015. Thesis, NSYSU. Accessed October 28, 2020. http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0526115-161822.

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

MLA Handbook (7th Edition):

Su , Po-chia. “Using Perforated plate Structures to Realize the Wave Invisible Effect of Acoustic Cloak.” 2015. Web. 28 Oct 2020.

Vancouver:

Su P. Using Perforated plate Structures to Realize the Wave Invisible Effect of Acoustic Cloak. [Internet] [Thesis]. NSYSU; 2015. [cited 2020 Oct 28]. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0526115-161822.

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

Council of Science Editors:

Su P. Using Perforated plate Structures to Realize the Wave Invisible Effect of Acoustic Cloak. [Thesis]. NSYSU; 2015. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0526115-161822

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

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