標題: Experimental modeling and design optimization of push-pull electret loudspeakers
作者: Bai, Mingsian R.
Wang, Chun-Jen
Chiang, Dar-Ming
Lin, Shu-Ru
機械工程學系
Department of Mechanical Engineering
關鍵字: acoustoelectric effects;electrets;loudspeakers;simulated annealing;vibrations
公開日期: 1-四月-2010
摘要: A fully experimental modeling technique and a design optimization procedure are presented in this paper for push-pull electret loudspeakers. Conventional electrical impedance-based parameter identification methods are not completely applicable to electret speakers due to the extremely weak electromechanical coupling. This prompts the development of an experimental technique for identifying the electroacoustic parameters of the electret speakers. Mechanical parameters are identified from the membrane velocity measured using a laser vibrometer. The voltage-force conversion factor and the motional impedance are estimated, with the aid of a test-box method. This experimentally identified model serves as the simulation platform for predicting the response of the electret loudspeaker and optimizing the design. Optimal parameters are calculated by using the simulated annealing (SA) algorithm to fulfill various design goals and constraints. Either the comprehensive search for various parameters or the simple search for the optimal gap distance can be conducted by this SA procedure. The results reveal that the optimized design has effectively enhanced the performance of the electret loudspeaker.
URI: http://dx.doi.org/10.1121/1.3337224
http://hdl.handle.net/11536/5592
ISSN: 0001-4966
DOI: 10.1121/1.3337224
期刊: JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
Volume: 127
Issue: 4
起始頁: 2274
結束頁: 2281
顯示於類別:期刊論文


文件中的檔案:

  1. 000276426100031.pdf