Finite Element Study of Perfect Sound Absorbing Porous Material with Periodic Conical Hole Profile
Abstract
Porous materials are widely used in several engineering applications for noise reduction. The acoustic performance of these materials at low frequency is low and depends on their acoustic penetration depth or critical depth. When the thickness of the porous material is equal to the critical depth, the sound absorption reaches its asymptotic limit so that a further increase in the material thickness does not improve the absorption coefficient. To overcome this limitation, a porous material design with a periodically distributed conical hole is proposed and its acoustic performance is investigated using the finite element method. Compared to a conventional porous layer, the total mass of the proposed design is reduced and its sound absorption coefficient is significantly improved over a large frequency band. This material design with periodic conical hole is coupled with other conventional porous materials to create a multi-layered system that shows efficient sound absorption performance. The proposed material design can be used as anechoic termination and help in several other applications for noise reduction.Additional Files
Published
How to Cite
Issue
Section
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:
-
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.
-
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.
-
Attribution: The Publisher agrees to include proper attribution to the Author(s) in all publications and reproductions of the Work.
-
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.
-
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.