https://scholars.lib.ntu.edu.tw/handle/123456789/452002
Title: | A thin light flexible electromechanically actuated electret-based loudspeaker for automotive applications | Authors: | Chen, Y.-C. Ko, W.-C. Chen, H.-L. Wu, W.-J. Chang, P.-Z. WEN-JONG WU CHIH-KUNG LEE PEI-ZEN CHANG |
Issue Date: | 2012 | Journal Volume: | 59 | Journal Issue: | 11 | Start page/Pages: | 4140-4147 | Source: | IEEE Transactions on Industrial Electronics | Abstract: | An electromechanically actuated electret-based loudspeaker made with an organic material membrane is presented, which is small in volume, extremely thin, and lightweight for light vehicle applications. As obtaining good sound quality in a vehicle is a complicated and difficult task, the electrostatic thin-film actuator can be cut into any shape and then assembled into an electret-based loudspeaker for placement at any location within the vehicle. The sound field in a vehicle can be optimized by properly tailoring the electret-based loudspeaker performance and choosing the most appropriate location for the loudspeaker for optimal sound performance. In addition, it is possible to design a novel 3-D sound field. Our newly fabricated 100-mm-by-100-mm electret loudspeaker weighs only 4 g and is 1 mm thick. It only consumes 0.15 mW to generate a sound pressure level at 88 dB at 1 kHz, which is very energy efficient for electric car applications. In summary, our newly flexible electret-based loudspeaker has tremendous potential for future automotive applications due to its excellent advantages over current vehicle loudspeakers. © 2011 IEEE. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/452002 | DOI: | 10.1109/TIE.2011.2174539 | SDG/Keyword: | Automotive applications; Energy efficient; Light vehicles; Organic materials; Over current; Sound pressure level; Sound Quality; Acoustic devices; Acoustic field measurement; Acoustic fields; Actuators; Automobile electronic equipment; Automobiles; Electrets; Electrostatic actuators; Energy efficiency; Loudspeakers; Optimization; Vehicles |
Appears in Collections: | 工程科學及海洋工程學系 |
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