L Schwan
Sound absorption and reflection from a resonant metasurface : homogenization model with experimental validation
Schwan, L; Umnova, O; Boutin, C
Authors
O Umnova
C Boutin
Abstract
Efficient manipulation of sound waves by some resonant acoustic metasurface designs has recently been reported in the literature. This paper presents a general theoretical framework for the description of sound wave interaction with the resonant metasurface that is independent of the nature of resonators and the excitation. The equations governing the behaviour of the metasurface are upscaled from the rigorous description of its unit cell using the two scale asymptotic homogenisation. The procedure relies on the existence of the boundary layer confined in the vicinity of the resonators operating in the deep subwavelength regime. The model is capable of describing sound interaction with the array of resonators positioned above or upon the substrate, so that the out of plane direction becomes an additional degree of freedom in the design. It is shown that at the leading order, the behaviour of the resonant surface is described in terms of the effective admittance, whose unconventional properties makes it possible to achieve the total sound absorption at multiple frequencies, broadband absorption, the phase reversal of the reflected wave at resonance and the control of the enclosure modes. The theory is validated by experiments performed in the impedance tube and in the anechoic environment using a surface array of spherical Helmholtz resonators with the extended inner neck. Experimental results confirm the effectiveness and robustness of the resonant surface for control of sound waves.
Citation
Schwan, L., Umnova, O., & Boutin, C. (2017). Sound absorption and reflection from a resonant metasurface : homogenization model with experimental validation. Wave Motion, 72, 154-172. https://doi.org/10.1016/j.wavemoti.2017.02.004
Journal Article Type | Article |
---|---|
Acceptance Date | Feb 9, 2017 |
Online Publication Date | Feb 12, 2017 |
Publication Date | Jul 1, 2017 |
Deposit Date | Feb 14, 2017 |
Publicly Available Date | Feb 14, 2017 |
Journal | Wave Motion |
Print ISSN | 0165-2125 |
Publisher | Elsevier |
Volume | 72 |
Pages | 154-172 |
DOI | https://doi.org/10.1016/j.wavemoti.2017.02.004 |
Publisher URL | http://dx.doi.org/10.1016/j.wavemoti.2017.02.004 |
Related Public URLs | http://www.sciencedirect.com/science/journal/01652125 |
Additional Information | Funders : Engineering and Physical Sciences Research Council (EPSRC) Projects : Periodicity enhances attenuating layers and structures (PEALS) Grant Number: EP/K037234/1 |
Files
wave_motion_2017.pdf
(2 Mb)
PDF
Licence
http://creativecommons.org/licenses/by/4.0/
Publisher Licence URL
http://creativecommons.org/licenses/by/4.0/
You might also like
Nonlinear behaviour of lossy acoustic black holes
(2024)
Journal Article
FE Modelling Tibia Bone Vibration - The Influence of Shape, Twist, and Size
(2024)
Journal Article
Urban Hedges as Noise Barriers: Does Plant Species Choice Affect Insertion Loss?
(2024)
Journal Article
Multiple resonances in lossy acoustic black holes - theory and experiment
(2022)
Journal Article
Downloadable Citations
About USIR
Administrator e-mail: library-research@salford.ac.uk
This application uses the following open-source libraries:
SheetJS Community Edition
Apache License Version 2.0 (http://www.apache.org/licenses/)
PDF.js
Apache License Version 2.0 (http://www.apache.org/licenses/)
Font Awesome
SIL OFL 1.1 (http://scripts.sil.org/OFL)
MIT License (http://opensource.org/licenses/mit-license.html)
CC BY 3.0 ( http://creativecommons.org/licenses/by/3.0/)
Powered by Worktribe © 2024
Advanced Search