Switchgrass-based noise absorbing material: Characterization and modeling

Authors

  • K. Verdière Department of Mechanical Engineering, GAUS, Université de Sherbrooke, Sherbrooke, QC J1K 2R1, Canada
  • R. Panneton Department of Mechanical Engineering, GAUS, Université de Sherbrooke, Sherbrooke, QC J1K 2R1, Canada
  • S. Elkoun Department of Mechanical Engineering, GAUS, Université de Sherbrooke, Sherbrooke, QC J1K 2R1, Canada
  • J.M. Lavoie Department of Chemical Engineering, Université de Sherbrooke, Sherbrooke, QC J1K 2R1, Canada
  • R. Oddo Department of Mechanical Engineering, GAUS, Université de Sherbrooke, Sherbrooke, QC J1K 2R1, Canada

Keywords:

Acoustic wave absorption, Absorbing materials, Adjacent layers, Experimental data, Geometrical parameters, Optimal thickness, Reliable models, Sound absorbing panels, Sound absorption coefficients, Space between, Switchgrass

Abstract

Switchgrass is a tall grass plant largely present in North America and especially in Canada. It grows from rhizomes and is characterized by stems that can reach, like bamboo or sugarcane, up to 2 meters high. Moreover, its roots can be as deep as 2 meters. It is important to mention that during the measurement, samples were not compressed. The only pressure to which they were subjected were their own weight. This model takes into account geometrical parameters of spheres, the porosity and the space between two adjacent layers of spheres. This approach can be applied as far as one can approximate the shape of switchgrass stems by a sphere. Two models were used to simulate the sound absorption coefficient and compared to experimental data. The Johnson Champoux Alard model was shown to be the most reliable model which allows the assumption that it can be used to find the optimal thickness for the design of switchgrass-based sound absorbing panels.

Additional Files

Published

2011-09-01

How to Cite

1.
Verdière K, Panneton R, Elkoun S, Lavoie J, Oddo R. Switchgrass-based noise absorbing material: Characterization and modeling. Canadian Acoustics [Internet]. 2011 Sep. 1 [cited 2024 Oct. 10];39(3):24-5. Available from: https://jcaa.caa-aca.ca/index.php/jcaa/article/view/2392

Issue

Vol. 39 No. 3 (2011)

Section

Proceedings of the Acoustics Week in Canada

License

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.