Acoustic impedance of a folded rectangular cross shape cavity

Sharafkhani, N; Qiu, X; Wei, D

Acoustic impedance of a folded rectangular cross shape cavity

Sharafkhani, N Qiu, X Wei, D

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Publication Type:: Conference Proceeding
Citation:: Proceedings of 2020 International Congress on Noise Control Engineering, INTER-NOISE 2020, 2020
Issue Date:: 2020-08-23

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Field	Value	Language
dc.contributor.author	Sharafkhani, N
dc.contributor.author	Qiu, X
dc.contributor.author	Wei, D https://orcid.org/0000-0002-4247-8905
dc.date.accessioned	2021-04-21T05:16:19Z
dc.date.available	2021-04-21T05:16:19Z
dc.date.issued	2020-08-23
dc.identifier.citation	Proceedings of 2020 International Congress on Noise Control Engineering, INTER-NOISE 2020, 2020
dc.identifier.isbn	9788994021362
dc.identifier.uri	http://hdl.handle.net/10453/148233
dc.description.abstract	Accurate estimation of the acoustics impedance of a folded cavity is important for predicting its sound absorption performance. In this paper, the effect caused by a right angle sharp bend on the acoustic impedance of a folded cavity with a rectangular cross section is investigated by comparing the sound absorption coefficients for the folded cavities to the straight ducts with the same length and cross section area. Based on the simulation results, a corrected parameter is proposed to calculate the equivalent geometries for the bend by dividing the cavity into folded and straight sections. The experiment results confirm the feasibility of the proposed formula.
dc.language	en
dc.relation.ispartof	Proceedings of 2020 International Congress on Noise Control Engineering, INTER-NOISE 2020
dc.rights	info:eu-repo/semantics/closedAccess
dc.title	Acoustic impedance of a folded rectangular cross shape cavity
dc.type	Conference Proceeding
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	closed_access	*
dc.date.updated	2021-04-21T05:16:17Z
pubs.publication-status	Published

Abstract:

Accurate estimation of the acoustics impedance of a folded cavity is important for predicting its sound absorption performance. In this paper, the effect caused by a right angle sharp bend on the acoustic impedance of a folded cavity with a rectangular cross section is investigated by comparing the sound absorption coefficients for the folded cavities to the straight ducts with the same length and cross section area. Based on the simulation results, a corrected parameter is proposed to calculate the equivalent geometries for the bend by dividing the cavity into folded and straight sections. The experiment results confirm the feasibility of the proposed formula.

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http://hdl.handle.net/10453/148233