{"title":"Development of woofer microspeakers used cellular phones","authors":"K. Bang, Y. Yang, G. Hwang, S.M. Hwang","doi":"10.1109/INTMAG.2005.1463750","DOIUrl":null,"url":null,"abstract":"In this paper, two important performance characteristics, SPL and 1/sup st/ resonant frequency, are analyzed for woofer microspeaker. For SPL and resonance analysis of microspeakers, magnetic force acting on the voice coil is determined by Lorentz law and electromagnetic FEM analysis. Harmonic analysis of diaphragm vibration and acoustical analysis are also followed using FEM to determine surface velocity of the diaphragm and sound pressure level. Noting that magnetic flux linkage is affected by vibrating voice coil, coupling between mechanical and magnetic analysis should be also considered. The simulated result of the proposed analysis is also compared with the experimental result for woofer microspeaker.","PeriodicalId":273174,"journal":{"name":"INTERMAG Asia 2005. Digests of the IEEE International Magnetics Conference, 2005.","volume":"41 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2005-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"3","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"INTERMAG Asia 2005. Digests of the IEEE International Magnetics Conference, 2005.","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/INTMAG.2005.1463750","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 3
Abstract
In this paper, two important performance characteristics, SPL and 1/sup st/ resonant frequency, are analyzed for woofer microspeaker. For SPL and resonance analysis of microspeakers, magnetic force acting on the voice coil is determined by Lorentz law and electromagnetic FEM analysis. Harmonic analysis of diaphragm vibration and acoustical analysis are also followed using FEM to determine surface velocity of the diaphragm and sound pressure level. Noting that magnetic flux linkage is affected by vibrating voice coil, coupling between mechanical and magnetic analysis should be also considered. The simulated result of the proposed analysis is also compared with the experimental result for woofer microspeaker.
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