Inverse acoustical characterization of porous media

Auteurs-es

  • Ali Hamoudi GAUS, Department of Mechanical Engineering, Université de Sherbrooke, Que. J1K 2R1, Canada
  • Raymond Panneton GAUS, Department of Mechanical Engineering, Université de Sherbrooke, Que. J1K 2R1, Canada

Mots-clés :

Acoustic waves, Elastic moduli, Mathematical models, Parameter estimation, Porosity, Airflow resistivity, Dynamic bulk modulus, Dynamic density, Thermal permeability, Tortuosity

Résumé

A six-parameter model by Johnson Lafarge is used to focus the inversion acoustical characterization of porous media. The model is used to describe the viscous and thermal dissipations of acoustic waves in the porous material. The six macroscopic parameters of the model are open porosity, static airflow resistivity, tortuosity, viscous characteristic dimension, thermal characteristic dimension, and static thermal permeability. The material can be modeled as an equivalent fluid under acoustical excitations if the frame of the porous material is assumed motionless. This equivalent fluid is described by its dynamic density and dynamic bulk modulus. Both dynamic properties are related to the macroscopic parameters of the material and depend on the frequency of excitation.

Fichiers supplémentaires

Publié-e

2007-09-01

Comment citer

1.
Hamoudi A, Panneton R. Inverse acoustical characterization of porous media. Canadian Acoustics [Internet]. 1 sept. 2007 [cité 18 mai 2024];35(3):200-1. Disponible à: https://jcaa.caa-aca.ca/index.php/jcaa/article/view/1968

Numéro

Vol. 35 No. 3 (2007)

Rubrique

Actes du congrès de la Semaine canadienne d'acoustique

Licence

Author Licensing Addendum

This Licensing Addendum ("Addendum") is entered into between the undersigned Author(s) and Canadian Acoustics journal published by the Canadian Acoustical Association (hereinafter referred to as the "Publisher"). The Author(s) and the Publisher agree as follows:

  1. Retained Rights: The Author(s) retain(s) the following rights:

    • The right to reproduce, distribute, and publicly display the Work on the Author's personal website or the website of the Author's institution.
    • The right to use the Work in the Author's teaching activities and presentations.
    • The right to include the Work in a compilation for the Author's personal use, not for sale.

  2. Grant of License: The Author(s) grant(s) to the Publisher a worldwide exclusive license to publish, reproduce, distribute, and display the Work in Canadian Acoustics and any other formats and media deemed appropriate by the Publisher.

  3. Attribution: The Publisher agrees to include proper attribution to the Author(s) in all publications and reproductions of the Work.

  4. No Conflict: This Addendum is intended to be in harmony with, and not in conflict with, the terms and conditions of the original agreement entered into between the Author(s) and the Publisher.

  5. Copyright Clause: Copyright on articles is held by the Author(s). The corresponding Author has the right to grant on behalf of all Authors and does grant on behalf of all Authors, a worldwide exclusive license to the Publisher and its licensees in perpetuity, in all forms, formats, and media (whether known now or created in the future), including but not limited to the rights to publish, reproduce, distribute, display, store, translate, create adaptations, reprints, include within collections, and create summaries, extracts, and/or abstracts of the Contribution.