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

Azbaid El Ouahabi, Abdelhalim and Memoli, Gianluca (2021) On the use of the Angular Spectrum Method for the evaluation of acoustic metasurfaces. Euronoise 2021, Madeira, Portugal, October 25-27, 2021. Published in: Euronoise 2021 proceedings. 1344-1353. Sociedade Portuguesa de Acústica (SPA) ISSN 2226-5147 ISBN 9789895338702

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Abstract

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.

Item Type: Conference Proceedings
Keywords: Angular spectrum method, acoustic metasurface, wavefront manipulation
Schools and Departments: School of Engineering and Informatics > Informatics
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SWORD Depositor: Mx Elements Account
Depositing User: Mx Elements Account
Date Deposited: 17 Sep 2021 14:15
Last Modified: 27 Apr 2022 11:13
URI: http://sro.sussex.ac.uk/id/eprint/101726

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Project NameSussex Project NumberFunderFunder Ref
AURORA: Controlling sound like we do with lightG2448EPSRC-ENGINEERING & PHYSICAL SCIENCES RESEARCH COUNCILEP/S001832/1