Aeroacoustic Optimization of a Metacage to Block the Noise Emitted by an Exhaust Fan

Authors

  • Marco Lizotte Venmar Ventilation ULC, CA
  • Jean-Bernard Piaud Independent acoustic and ventilation advisor, CA
  • Raymond Panneton Université de Sherbrooke
  • Tenon Charly Kone National Research Council of Canada, CA
  • Jean-Christophe Cuillière Université du Québec à Trois-Rivières (UQTR), CA
  • Vincent François Université du Québec à Trois-Rivières (UQTR), CA

Abstract

In buildings, HVAC systems are taking care of air quality by exchanging polluted air for fresher one. However, they generate noise pollution disturbing the occupants. The challenge of allowing air to flow freely into the system while preventing noise from exiting is quite significant. Here is presented a solution by using an acoustic cage made of metamaterial, known as a metacage. It is constructed of sonic crystals arranged in a certain pattern which follows Bragg's law to a first approximation. Then, the shape and arrangement of the metacage and its crystals is obtained by computational experiments using Latin Hypercube Sampling (LHS). This makes it possible to create a metamodel with few experiments and find an optimal concept for the case studied, using only Open-Source software. A prototype was manufactured and tested, with and without airflow, on a bathroom fan according to different measurement standards. Comparisons with predictions are good, resulting a noise reduction of 2.3 to 1 sone, which represents 5.5 dB in terms of sound power.

Additional Files

Published

2023-10-09

How to Cite

1.
Lizotte M, Piaud J-B, Panneton R, Kone TC, Cuillière J-C, François V. Aeroacoustic Optimization of a Metacage to Block the Noise Emitted by an Exhaust Fan. Canadian Acoustics [Internet]. 2023 Oct. 9 [cited 2024 Nov. 22];51(3):138-9. Available from: https://jcaa.caa-aca.ca/index.php/jcaa/article/view/4071

Issue

Vol. 51 No. 3 (2023): Proceedings of Acoustics Week in Canada 2023 Conference

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.

Most read articles by the same author(s)

1 2 3 4 > >>