Acoustic absorption of non-homogeneous poro-elastic materials

Authors

  • Celse K. Amédin GAUS, Dept. de Genie Mecan., Université de Sherbrooke, Sherbrooke, Que. J1K 2R1, Canada
  • Noureddine Atalla GAUS, Dept. de Genie Mecan., Université de Sherbrooke, Sherbrooke, Que. J1K 2R1, Canada
  • Franck Sgard Lab. des Sciences de l'Habitat, DGCB URA CNRS 1652, Ecl. Natl. Travaux Publics de l'Etat, 69518 Vaux-en Velin Cedex, France

Keywords:

Finite element method, Mathematical models, Mineral wool, Porous materials, Tensile stress, Waveguides, Biot theory

Abstract

A model to evaluate the acoustic absorption performance of configurations consisting of a porous material, bonded onto the hard termination of a semi-infinite rectangular waveguide is presented. A power balance approach is used to evaluate the performance of the porus material using the absorption coefficient. An experimental validation is performed for a macro-perforated material, which consists in a mineral wool with periodic holes containing air. The absorption coefficient of non-homogeneous porous-elastic layers is predicted.

Additional Files

Published

2000-09-01

How to Cite

1.
Amédin CK, Atalla N, Sgard F. Acoustic absorption of non-homogeneous poro-elastic materials. Canadian Acoustics [Internet]. 2000 Sep. 1 [cited 2025 Feb. 15];28(3):90-1. Available from: https://jcaa.caa-aca.ca/index.php/jcaa/article/view/1304

Issue

Vol. 28 No. 3 (2000)

Section

Proceedings of the Acoustics Week in Canada

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