Acoustics of a cabinetless transparent speaker

Yu Tsung Chiu*, Chun Ti Chen, Jyi Tyan Yeh, You-Chia Chang

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

The design method for a cabinetless transparent speaker is developed in this research. The speaker is composed of a vibrating membrane, and its driving electrodes. All of them are transparent. The membrane is made from electret, and the electrodes are perforated plastic plates coated with transparent conducting layer. The thickness of the whole integrated structured is no more than one millimeter. Several issues are studied. First of all, the driving mechanism of the electret is investigated by electrostatics. At the same time, it is found that the speaker with single electrode generates distortion, while the speaker with double electrodes doesn't. Secondly, the acoustic impedance of a perforated plate of is examined. It is with the positive dependence on the thickness of the plate, as well as the negative dependence with the diameter of each hole and the porosity. Thirdly, a fluid-structure coupled finite element model is built to analyze the acoustics with various magnitude of pre-stress and charged density of the membrane. Finally, the sound pressure level (SPL) is generated and is used to evaluate the performance of the speaker.

Original languageEnglish
Title of host publication16th International Congress on Sound and Vibration 2009, ICSV 2009
Pages3254-3261
Number of pages8
StatePublished - 1 Dec 2009
Event16th International Congress on Sound and Vibration 2009, ICSV 2009 - Krakow, Poland
Duration: 5 Jul 20099 Jul 2009

Publication series

Name16th International Congress on Sound and Vibration 2009, ICSV 2009
Volume5

Conference

Conference16th International Congress on Sound and Vibration 2009, ICSV 2009
CountryPoland
CityKrakow
Period5/07/099/07/09

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