A finite element approach to a coupled structural-acoustic radiation system with application to loudspeaker characteristic calculation |
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| Authors: | Y Kagawa T Yamabuchi K Sugihara T Shindou |
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| Institution: | Department of Electrical Engineering, National University Toyama, Takaoka, Toyama 933, Japan;Consumer Product Research Laboratory, Mitsubishi Electric Corporation, Kamakura, 247, Japan |
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| Abstract: | The finite element method is applied to an elastic shell which is vibrating to generate acoustic radiation. A vibrating shell of revolution backed by an enclosure in its rear side is to radiate sound waves into a semi-infinite space in front. As a numerical example, some characteristics of a direct radiator type loudspeaker model are calculated and discussed. The driving point impedance and the far field sound pressure frequency characteristics are shown, together with the effects of the radiation and the enclosure. |
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