FINITE-ELEMENT METHOD FOR PREDICTING THE ACOUSTICAL PROPERTIES OF POROUS SAMPLES

Authors
JOHANSEN TF ALLARD JF BROUARD B
Citation
Tf. Johansen et al., FINITE-ELEMENT METHOD FOR PREDICTING THE ACOUSTICAL PROPERTIES OF POROUS SAMPLES, Acta acustica, 3(5), 1995, pp. 487-491
Citations number
17
Categorie Soggetti
Acoustics
Journal title
Acta acustica → ACNP
ISSN journal
10224793
Volume
3
Issue
5
Year of publication
1995
Pages
487 - 491
Database
ISI
SICI code
1022-4793(1995)3:5<487:FMFPTA>2.0.ZU;2-T
Abstract
A two-dimensional finite element program based on the Biot theory is u sed to predict the surface impedance of a porous layer of infinite lat eral extension, and the behaviour of a sample of finite dimensions ins ide an impedance tube, with an air gap between the tube and the sample . Lateral absorption and the effects of the elasticity of the frame ar e included in the formulation and the results are compared with a meas urement performed previously.