Sound attenuation enhancement of acoustic meta-atoms via coupling.

Kronowetter, F; Pretsch, L; Chiang, YK; Melnikov, A; Sepehrirahnama, S; Oberst, S; Powell, DA; Marburg, S

Sound attenuation enhancement of acoustic meta-atoms via coupling.

Kronowetter, F Pretsch, L Chiang, YK Melnikov, A Sepehrirahnama, S Oberst, S

Powell, DA Marburg, S

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Publisher:: Acoustical Society of America (ASA)
Publication Type:: Journal Article
Citation:: J Acoust Soc Am, 2023, 154, (2), pp. 842-851
Issue Date:: 2023-08-01

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Field	Value	Language
dc.contributor.author	Kronowetter, F
dc.contributor.author	Pretsch, L
dc.contributor.author	Chiang, YK
dc.contributor.author	Melnikov, A
dc.contributor.author	Sepehrirahnama, S
dc.contributor.author	Oberst, S https://orcid.org/0000-0002-1388-2749
dc.contributor.author	Powell, DA
dc.contributor.author	Marburg, S
dc.date.accessioned	2023-11-17T00:01:30Z
dc.date.available	2023-07-20
dc.date.available	2023-11-17T00:01:30Z
dc.date.issued	2023-08-01
dc.identifier.citation	J Acoust Soc Am, 2023, 154, (2), pp. 842-851
dc.identifier.issn	0001-4966
dc.identifier.issn	1520-8524
dc.identifier.uri	http://hdl.handle.net/10453/173445
dc.description.abstract	Arrangements of acoustic meta-atoms, better known as acoustic metamaterials, are commonly applied in acoustic cloaking, for the attenuation of acoustic fields or for acoustic focusing. A precise design of single meta-atoms is required for these purposes. Understanding the details of their interaction allows improvement of the collective performance of the meta-atoms as a system, for example, in sound attenuation. Destructive interference of their scattered fields, for example, can be mitigated by adjusting the coupling or tuning of individual meta-atoms. Comprehensive numerical studies of various configurations of a resonator pair show that the coupling can lead to degenerate modes at periodic distances between the resonators. We show how the resonators' separation and relative orientation influence the coupling and thereby tunes the sound attenuation. The simulation results are supported by experiments using a two-dimensional parallel-plate waveguide. It is shown that coupling parameters like distance, orientation, detuning, and radiation loss provide additional degrees of freedom for efficient acoustic meta-atom tuning to achieve unprecedented interactions with excellent sound attenuation properties.
dc.format	Print
dc.language	eng
dc.publisher	Acoustical Society of America (ASA)
dc.relation.ispartof	J Acoust Soc Am
dc.relation.isbasedon	10.1121/10.0020570
dc.rights	info:eu-repo/semantics/openAccess
dc.subject.classification	Acoustics
dc.title	Sound attenuation enhancement of acoustic meta-atoms via coupling.
dc.type	Journal Article
utslib.citation.volume	154
utslib.location.activity	United States
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	2023-11-17T00:01:28Z
pubs.issue	2
pubs.publication-status	Published
pubs.volume	154
utslib.citation.issue	2

Abstract:

Arrangements of acoustic meta-atoms, better known as acoustic metamaterials, are commonly applied in acoustic cloaking, for the attenuation of acoustic fields or for acoustic focusing. A precise design of single meta-atoms is required for these purposes. Understanding the details of their interaction allows improvement of the collective performance of the meta-atoms as a system, for example, in sound attenuation. Destructive interference of their scattered fields, for example, can be mitigated by adjusting the coupling or tuning of individual meta-atoms. Comprehensive numerical studies of various configurations of a resonator pair show that the coupling can lead to degenerate modes at periodic distances between the resonators. We show how the resonators' separation and relative orientation influence the coupling and thereby tunes the sound attenuation. The simulation results are supported by experiments using a two-dimensional parallel-plate waveguide. It is shown that coupling parameters like distance, orientation, detuning, and radiation loss provide additional degrees of freedom for efficient acoustic meta-atom tuning to achieve unprecedented interactions with excellent sound attenuation properties.

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http://hdl.handle.net/10453/173445