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A Study on the Acoustical Properties of Micro-speaker according to Comb Teeth Shape of the Diaphragm  

Lee, Tae-Keun (광원텍(주) 기술연구소)
Kim, Byoung-Sam (원광대학교 기계자동차공학부)
Cho, Tae-Jea (동국대학교 대학원)
Publication Information
Transactions of the Korean Society of Machine Tool Engineers / v.17, no.6, 2008 , pp. 124-131 More about this Journal
Abstract
There are many factors which affect the acoustical properties of a micro-speaker. Among the factors, the shape of the diaphragm is considered in this study. As an investigating method, the finite element methods and measurement techniques applied to study the acoustical properties according to diaphragm shape. In order to vary the stiffness of the diaphragm, the some patterns of comb teeth, such as the angle and the number of comb teeth, are applied to diaphragm. We can confirm that the change of the stiffness by the changing diaphragm shape affects the vibration and sound properties of the speaker. As a result, the reduction of the angle of the comb teeth increases the diaphragm stiffness and shifts the resonance frequency to a higher frequency range. The number of the comb teeth is related to the stiffness of the edge part.
Keywords
Micro-speaker; Diaphragm; Acoustic impedance; Resonance frequency; Mode shape;
Citations & Related Records
Times Cited By KSCI : 5  (Citation Analysis)
연도 인용수 순위
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