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On the use of the Angular Spectrum Method for the evaluation of acoustic metasurfaces

conference contribution
posted on 2023-06-10, 01:00 authored by Abdelhalim Azbaid El Ouahabi, Gianluca MemoliGianluca Memoli
Metasurfaces with unit cells at sub-wavelength scale have been successfully used to precisely control and manipulate waves, and applications based on static metasurfaces are on the surge. The design of these metasurfaces, however, often proceeds by trial and error, benchmarking different solutions with finite elements method (FEM) simulations. This is a batch process, which is not quick enough for the real-time adjustments of sound fields promised by adjustable metamaterials. Here, we present a numerical investigation of sound wave propagation after travelling through a metasurface using the Angular Spectrum Method (ASM). Using different application-focused cases (e.g., focusing, steering, self-bending), we compare the predicted result with the simulated distributions of sound pressure obtained with a commercial FE software. Finally, we present a preliminary discussion on the cost-efficiency of the two approaches and on the perspectives opened by using the ASM as a design tool.

Funding

AURORA: Controlling sound like we do with light; G2448; EPSRC-ENGINEERING & PHYSICAL SCIENCES RESEARCH COUNCIL; EP/S001832/1

History

Publication status

  • Published

Journal

Euronoise 2021 proceedings

ISSN

2226-5147

Publisher

Sociedade Portuguesa de Acústica (SPA)

Page range

1344-1353

Event name

Euronoise 2021

Event location

Madeira, Portugal

Event type

conference

Event date

October 25-27, 2021

ISBN

9789895338702

Department affiliated with

  • Informatics Publications

Full text available

  • No

Peer reviewed?

  • Yes

Legacy Posted Date

2021-09-17

First Compliant Deposit (FCD) Date

2021-10-26

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