Sound transmission loss of porous materials in ducts with embedded periodic scatterers.

Jena, DP; Qiu, X

Sound transmission loss of porous materials in ducts with embedded periodic scatterers.

Jena, DP Qiu, X

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Publisher:: ACOUSTICAL SOC AMER AMER INST PHYSICS
Publication Type:: Journal Article
Citation:: The Journal of the Acoustical Society of America, 2020, 147, (2), pp. 978-983
Issue Date:: 2020-02

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Field	Value	Language
dc.contributor.author	Jena, DP
dc.contributor.author	Qiu, X https://orcid.org/0000-0002-5181-1220
dc.date.accessioned	2021-03-11T05:50:57Z
dc.date.available	2021-03-11T05:50:57Z
dc.date.issued	2020-02
dc.identifier.citation	The Journal of the Acoustical Society of America, 2020, 147, (2), pp. 978-983
dc.identifier.issn	0001-4966
dc.identifier.issn	1520-8524
dc.identifier.uri	http://hdl.handle.net/10453/147042
dc.description.abstract	Porous materials that are commonly used for sound absorption have poor sound insulation capability. In this paper, rigid scatterers are installed periodically inside porous materials to improve their transmission loss (TL) with the Bragg diffraction. The Delany-Bazley impedance model is used to model the porous material and the transfer matrix method is adopted to calculate the TL of the mixed structure in a duct. Simulation results with a different number of scatterers and porous materials with different airflow resistivity show that the TL of porous materials can be increased significantly with periodically arranged scatterers. The decoupled analysis reveals that the TL of the mixed structure is larger than the sum of the TL of individual components in most frequency bands, except that around the first Bragg resonance frequency.
dc.format	Print
dc.language	eng
dc.publisher	ACOUSTICAL SOC AMER AMER INST PHYSICS
dc.relation.ispartof	The Journal of the Acoustical Society of America
dc.relation.isbasedon	10.1121/10.0000650
dc.rights	info:eu-repo/semantics/openAccess
dc.subject.classification	Acoustics
dc.title	Sound transmission loss of porous materials in ducts with embedded periodic scatterers.
dc.type	Journal Article
utslib.citation.volume	147
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	*
pubs.consider-herdc	false
dc.date.updated	2021-03-11T05:50:52Z
pubs.issue	2
pubs.publication-status	Published
pubs.volume	147
utslib.citation.issue	2

Abstract:

Porous materials that are commonly used for sound absorption have poor sound insulation capability. In this paper, rigid scatterers are installed periodically inside porous materials to improve their transmission loss (TL) with the Bragg diffraction. The Delany-Bazley impedance model is used to model the porous material and the transfer matrix method is adopted to calculate the TL of the mixed structure in a duct. Simulation results with a different number of scatterers and porous materials with different airflow resistivity show that the TL of porous materials can be increased significantly with periodically arranged scatterers. The decoupled analysis reveals that the TL of the mixed structure is larger than the sum of the TL of individual components in most frequency bands, except that around the first Bragg resonance frequency.

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http://hdl.handle.net/10453/147042