Magneto-electrodynamical modeling and design of a microspeaker used for mobile phones with considerations of diaphragm corrugation and air closures

Chang-Po Chao*, Chi W. Chiu, Yuan Hsu-Pang

*Corresponding author for this work

研究成果: Article同行評審

13 引文 斯高帕斯(Scopus)

摘要

Recent design trends for modern mobile phones are evolving to be miniaturized and versatile sounds in quality. To these ends, a microspeaker with a corrugated diaphragm is employed to broaden the sound frequency range. Due to the fact that diaphragm corrugation and air closures were not considered in any past studies, this study presents comprehensive modeling with the consideration of diaphragm corrugations and air closures. It starts with the modeling on the subsystems of the voice coil motor (VCM) in the speaker. The magnetic field of the VCM is modeled by one set of finite elements, while the corrugated diaphragm is modeled by another set of finite elements. In addition, the air closures above or below the diaphragm are modeled by the third group of finite elements based on basic acoustics. Simulations are conducted with and without air closures. It is found that: 1) the speaker with 45° corrugation exhibits overall higher (better) sound pressure levels (SPLs), while 2) the 75° corrugation leads to unsatisfied, low SPLs below 1 kHz and two undesired antiresonances at higher frequencies. The theoretical findings are successfully validated by experiments.

原文English
頁(從 - 到)2585-2587
頁數3
期刊IEEE Transactions on Magnetics
43
發行號6
DOIs
出版狀態Published - 1 六月 2007

指紋 深入研究「Magneto-electrodynamical modeling and design of a microspeaker used for mobile phones with considerations of diaphragm corrugation and air closures」主題。共同形成了獨特的指紋。

引用此