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Exploring the Ultra-Directional Acoustic Response of an Electret Cell Array Loudspeaker

In recent years, novel thin-plate loudspeakers have triggered much interest. Applications in areas such as 3C peripherals, automobile audio systems, and home theater have been actively discussed. However, the acoustic directivity of a thin-plate loudspeaker depends on the frequency response. At this time, thin-plate loudspeakers have poor directivity. However, if this limitation can be overcome, thin-plate loudspeakers can find useful applications such as in museums, supermarkets, or exhibition areas which require a channeling the sound to a particular area or location without affecting nearby areas or un-intended audiences. From previous studies, electret cell arrays have been confirmed to be an excellent flexible flat loudspeaker since it can create high performance sounds in a mid to high frequency range. An electret loudspeaker can generate ultra-directional audible sound by adjusting the array size, amplitude modulation and layout structure.

Authors: Chang, Pei-Zen; Chen, Yu-Chi; Cheng, Chih-Chiang; Hsiao, Wen-Hsin; Ko, Wen-Ching; Lee, Chih-Kung; Liou, Chang-Ho; Wu, Wen-Jong
Affiliations: Engineering Science & Ocean Engineering, National Taiwan University,Taipei, Taiwan; Institute of Applied Mechanics, National Taiwan University, Taipei, Taiwan; Industrial Technology Research Institute, Hsinchu, Taiwan; Institute for Information Industry, Taipei, Taiwan(See document for exact affiliation information.)
AES Convention:129 (November 2010) Paper Number:8239 Import into BibTeX
Subject:Loudspeakers and Microphones

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