Subwavelength broadband sound absorber based on a composite metasurface.

Long, H; Liu, C; Shao, C; Cheng, Y; Chen, K; Qiu, X; Liu, X

Subwavelength broadband sound absorber based on a composite metasurface.

Long, H Liu, C Shao, C Cheng, Y Chen, K Qiu, X

Liu, X

Permalink

Publisher:: Springer Science and Business Media LLC
Publication Type:: Journal Article
Citation:: Scientific reports, 2020, 10, (1), pp. 13823
Issue Date:: 2020-08-14

Open Access

Copyright Clearance Process

Recently Added
In Progress
Open Access

This item is open access.

Adobe PDF

Download full textAdobe PDF (3.49 MB)

View on publisher's site

View statistics

Full metadata record

Field	Value	Language
dc.contributor.author	Long, H
dc.contributor.author	Liu, C
dc.contributor.author	Shao, C
dc.contributor.author	Cheng, Y
dc.contributor.author	Chen, K
dc.contributor.author	Qiu, X https://orcid.org/0000-0002-5181-1220
dc.contributor.author	Liu, X
dc.date.accessioned	2021-06-17T04:57:04Z
dc.date.available	2020-08-03
dc.date.available	2021-06-17T04:57:04Z
dc.date.issued	2020-08-14
dc.identifier.citation	Scientific reports, 2020, 10, (1), pp. 13823
dc.identifier.issn	2045-2322
dc.identifier.issn	2045-2322
dc.identifier.uri	http://hdl.handle.net/10453/149590
dc.description.abstract	Suppressing broadband low-frequency sound has great scientific and engineering significance. However, normal porous acoustic materials backed by a rigid wall cannot really play its deserved role on low-frequency sound absorption. Here, we demonstrate that an ultrathin sponge coating can achieve high-efficiency absorptions if backed by a metasurface with moderate surface impedance. Such a metasurface is constructed in a wide frequency range by integrating three types of coiled space resonators. By coupling an ultrathin sponge coating with the designed metasurface, a deep-subwavelength broadband absorber with high absorptivity ([Formula: see text]) exceeding one octave from 185 Hz to 385 Hz (with wavelength [Formula: see text] from 17.7 to 8.5 times of thickness of the absorber) has been demonstrated theoretically and experimentally. The construction mechanism is analyzed via coupled mode theory. The study provides a practical way in constructing broadband low-frequency sound absorber.
dc.format	Electronic
dc.language	eng
dc.publisher	Springer Science and Business Media LLC
dc.relation.ispartof	Scientific reports
dc.relation.isbasedon	10.1038/s41598-020-70714-7
dc.rights	info:eu-repo/semantics/openAccess
dc.title	Subwavelength broadband sound absorber based on a composite metasurface.
dc.type	Journal Article
utslib.citation.volume	10
utslib.location.activity	England
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Mechanical and Mechatronic Engineering
utslib.copyright.status	open_access	*
dc.date.updated	2021-06-17T04:56:59Z
pubs.issue	1
pubs.publication-status	Published
pubs.volume	10
utslib.citation.issue	1

Abstract:

Suppressing broadband low-frequency sound has great scientific and engineering significance. However, normal porous acoustic materials backed by a rigid wall cannot really play its deserved role on low-frequency sound absorption. Here, we demonstrate that an ultrathin sponge coating can achieve high-efficiency absorptions if backed by a metasurface with moderate surface impedance. Such a metasurface is constructed in a wide frequency range by integrating three types of coiled space resonators. By coupling an ultrathin sponge coating with the designed metasurface, a deep-subwavelength broadband absorber with high absorptivity ([Formula: see text]) exceeding one octave from 185 Hz to 385 Hz (with wavelength [Formula: see text] from 17.7 to 8.5 times of thickness of the absorber) has been demonstrated theoretically and experimentally. The construction mechanism is analyzed via coupled mode theory. The study provides a practical way in constructing broadband low-frequency sound absorber.

Please use this identifier to cite or link to this item:

http://hdl.handle.net/10453/149590