RECENT TOPICS CONCERNING THE ACOUSTICS OF FIBROUS AND POROUS MATERIALS

被引：22

作者：

ALLARD, JF

HERZOG, P

LAFARGE, D

TAMURA, M

机构：

[1] Laboratoire d'Acoustique Associé au CNRS, URA 1101, Faculté des Sciences du Mans, 72017 Le Mans Cedex, Avenue Olivier Messiaen

来源：

APPLIED ACOUSTICS | 1993年 / 39卷 / 1-2期

关键词：

Acoustic impedance models - Anisotropic elastic materials - Biot's theory - Elastic frame materials - Fibrous sound absorbing materials - Porous sound absorbing materials - Surface acoustic impedance;

D O I：

10.1016/0003-682X(93)90027-4

中图分类号：

O42 [声学];

学科分类号：

070206 ; 082403 ;

摘要：

Recent developments in the theory for acoustical properties of porous materials with rigid frames introduced two characteristic dimensions related to the high-frequency behaviour of the viscous forces and the thermal exchanges in addition to the classical parameters of porosity, flow resistivity and tortuosity. These characteristic dimensions are used with recent expressions of the effective mass and the compressibility of the air in porous materials to predict the surface impedance in the high-frequency range. Measurements of the surface impedance performed in a free field are used to evaluate the accuracy of the model. The same model is generalised in the context of the Biot theory to the case of elastic framed materials. The effect of the frame wave on the surface impedance of a layer fibrous material, an on the transmission through a fibrous material bonded onto a plate is studied with this new model.

引用

页码：3 / 21

页数：19

共 23 条

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