Effect of an air-back cavity on the sound field reflected by a vibrating plate

被引：14

作者：

Nakanishi, S ^{[1
]}

Sakagami, K ^{[1
]}

Daido, M ^{[1
]}

Morimoto, M ^{[1
]}

机构：

[1] Kobe Univ, Fac Engn, Environm Acoust Lab, Kobe, Hyogo 6578501, Japan

来源：

APPLIED ACOUSTICS | 1999年 / 56卷 / 04期

关键词：

reflection; spherical wave; point force; air cavity; elastic plate;

D O I：

10.1016/S0003-682X(98)00033-4

中图分类号：

O42 [声学];

学科分类号：

070206 ; 082403 ;

摘要：

The effect of an air-back cavity on the spherical wave reflected by the stage floor is analyzed theoretically. An air-cavity backed infinite elastic plate is driven to vibration by a point force. A closed form expression for the far-field solution is derived by coupling the Helmholtz integrals for sound field and the equation of the plate motion. Numerical examples demonstrate four main features of the sound field. Two of them are absent for the plate without the air-cavity: one is a panel absorption dip owing to the plate and air-cavity resonance system. The other is small peaks and dips due to the acoustic resonances of the air-cavity. (C) 1998 Elsevier Science Ltd. All rights reserved.

引用

页码：241 / 256

页数：16

共 43 条

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