https://scholars.lib.ntu.edu.tw/handle/123456789/625538
標題: | Influences of Diaphragm Materials on the Performance of a Microspeaker | 作者: | CHAO-NAN WANG Chang J.-R Chang W.-C. |
關鍵字: | Diaphragm; Loudspeaker; Mode shape | 公開日期: | 2015 | 卷: | 31 | 期: | 3 | 起(迄)頁: | 331-336 | 來源出版物: | Journal of Mechanics | 摘要: | The purpose of this study was to investigate the influence of a diaphragm material on the performance of a microspeaker. The finite element method was adopted to analyze the mode shapes and the displacement of the diaphragm under a force load. The Rayleigh integral was then calculated to determine the radiated sound pressure and frequency response of a loudspeaker. The location of the voice coil was also investigated. Locating the voice coil at approximately 53% to 76% of coil-radius/diaphragm-radius ratio yielded a favorable mode shape distribution and performance for the loudspeaker. In addition, two loudspeaker designs, Models A and B, were analyzed to determine the effects of the diaphragm material. The numerical results of Models A and B, indicated that the mode shape is a crucial factor when considering the materials used in a loudspeaker diaphragm. The property of a material at the inflection point of a mode shape obviously affects the modal frequency. According to this observation, the most crucial first and second axial symmetric modes in a loudspeaker design can be adjusted and the performance can be improved. Copyright © The Society of Theoretical and Applied Mechanics, 2015. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84930753218&doi=10.1017%2fjmech.2015.4&partnerID=40&md5=d80987989c75bd9dc6350596b2566e4d https://scholars.lib.ntu.edu.tw/handle/123456789/625538 |
ISSN: | 17277191 | DOI: | 10.1017/jmech.2015.4 | SDG/關鍵字: | Diaphragms; Finite element method; Frequency response; Loudspeakers; Inflection points; Microspeakers; Modal frequency; Mode shapes; Numerical results; Radiated sound pressure; Rayleigh integrals; Symmetric mode; Electric coils |
顯示於: | 工程科學及海洋工程學系 |
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