Bilayer ventilated labyrinthine metasurfaces with high sound absorption and tunable bandwidth

Abstract The recent advent of acoustic metamaterials offers unprecedented opportunities for sound controlling in various occasions, whereas it remains a challenge to attain broadband high sound absorption and free air flow simultaneously. Here, we demonstrated, both theoretically and experimentally,...

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Autores principales:	Jiayuan Du, Yuezhou Luo, Xinyu Zhao, Xiaodong Sun, Yanan Song, Xinhua Hu
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/2709de534ac445dab93e183022af0c07
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spelling	oai:doaj.org-article:2709de534ac445dab93e183022af0c072021-12-02T13:15:56ZBilayer ventilated labyrinthine metasurfaces with high sound absorption and tunable bandwidth10.1038/s41598-021-84986-02045-2322https://doaj.org/article/2709de534ac445dab93e183022af0c072021-03-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-84986-0https://doaj.org/toc/2045-2322Abstract The recent advent of acoustic metamaterials offers unprecedented opportunities for sound controlling in various occasions, whereas it remains a challenge to attain broadband high sound absorption and free air flow simultaneously. Here, we demonstrated, both theoretically and experimentally, that this problem can be overcome by using a bilayer ventilated labyrinthine metasurface. By altering the spacing between two constituent single-layer metasurfaces and adopting asymmetric losses in them, near-perfect (98.6%) absorption is achieved at resonant frequency for sound waves incident from the front. The relative bandwidth of absorption peak can be tuned in a wide range (from 12% to 80%) by adjusting the open area ratio of the structure. For sound waves from the back, the bilayer metasurface still serves as a sound barrier with low transmission. Our results present a strategy to realize high sound absorption and free air flow simultaneously, and could find applications in building acoustics and noise remediation.Jiayuan DuYuezhou LuoXinyu ZhaoXiaodong SunYanan SongXinhua HuNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-8 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Jiayuan Du Yuezhou Luo Xinyu Zhao Xiaodong Sun Yanan Song Xinhua Hu Bilayer ventilated labyrinthine metasurfaces with high sound absorption and tunable bandwidth
description	Abstract The recent advent of acoustic metamaterials offers unprecedented opportunities for sound controlling in various occasions, whereas it remains a challenge to attain broadband high sound absorption and free air flow simultaneously. Here, we demonstrated, both theoretically and experimentally, that this problem can be overcome by using a bilayer ventilated labyrinthine metasurface. By altering the spacing between two constituent single-layer metasurfaces and adopting asymmetric losses in them, near-perfect (98.6%) absorption is achieved at resonant frequency for sound waves incident from the front. The relative bandwidth of absorption peak can be tuned in a wide range (from 12% to 80%) by adjusting the open area ratio of the structure. For sound waves from the back, the bilayer metasurface still serves as a sound barrier with low transmission. Our results present a strategy to realize high sound absorption and free air flow simultaneously, and could find applications in building acoustics and noise remediation.
format	article
author	Jiayuan Du Yuezhou Luo Xinyu Zhao Xiaodong Sun Yanan Song Xinhua Hu
author_facet	Jiayuan Du Yuezhou Luo Xinyu Zhao Xiaodong Sun Yanan Song Xinhua Hu
author_sort	Jiayuan Du
title	Bilayer ventilated labyrinthine metasurfaces with high sound absorption and tunable bandwidth
title_short	Bilayer ventilated labyrinthine metasurfaces with high sound absorption and tunable bandwidth
title_full	Bilayer ventilated labyrinthine metasurfaces with high sound absorption and tunable bandwidth
title_fullStr	Bilayer ventilated labyrinthine metasurfaces with high sound absorption and tunable bandwidth
title_full_unstemmed	Bilayer ventilated labyrinthine metasurfaces with high sound absorption and tunable bandwidth
title_sort	bilayer ventilated labyrinthine metasurfaces with high sound absorption and tunable bandwidth
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/2709de534ac445dab93e183022af0c07
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Bilayer ventilated labyrinthine metasurfaces with high sound absorption and tunable bandwidth

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