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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 MemoliMetasurfaces 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 proceedingsISSN
2226-5147Publisher
Sociedade Portuguesa de Acústica (SPA)Page range
1344-1353Event name
Euronoise 2021Event location
Madeira, PortugalEvent type
conferenceEvent date
October 25-27, 2021ISBN
9789895338702Department affiliated with
- Informatics Publications
Full text available
- No
Peer reviewed?
- Yes
Legacy Posted Date
2021-09-17First Compliant Deposit (FCD) Date
2021-10-26Usage metrics
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