Resonant frequency shifts induced by a large spherical object in an air-filled acoustic cavity

被引:5
作者
Cordero, Maria Luisa [1 ]
Mujica, Nicolas [1 ]
机构
[1] Univ Chile, Dept Fis, Fac Ciencias Fis & Matemat, Santiago, Chile
关键词
D O I
10.1121/1.2739110
中图分类号
O42 [声学];
学科分类号
070206 ; 082403 ;
摘要
Acoustic resonances are modified when objects are introduced into a chamber. The magnitude of these changes depends on the object position, size, and shape, as well as on its acoustic properties. Here, an experimental study concerning the resonant frequency. shifts induced by a solid spherical object in a quasi-one-dimensional air-filled acoustic cavity is reported. It is shown that Leung's theory does not account quantitatively for the observations. A novel and simple approach is proposed, based on the wave equation in a cavity of variable cross section. The results fit more accurately the measured frequency shifts. (c) 2007 Acoustical Society of America.
引用
收藏
页码:EL244 / EL250
页数:7
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