Acoustic metamaterial capsule for reduction of stage machinery noise

Melnikov, A; Maeder, M; Friedrich, N; Pozhanka, Y; Oberst, S; Wollmann, A; Scheffler, M; Powell, D; Marburg, S

Acoustic metamaterial capsule for reduction of stage machinery noise

Melnikov, A Maeder, M Friedrich, N Pozhanka, Y Oberst, S

Wollmann, A Scheffler, M Powell, D Marburg, S

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Publisher:: Acoustical Society of America
Publication Type:: Journal Article
Citation:: Journal of the Acoustical Society of America, 2020, 147, (3), pp. 1491-1491
Issue Date:: 2020-03-15

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Field	Value	Language
dc.contributor.author	Melnikov, A
dc.contributor.author	Maeder, M
dc.contributor.author	Friedrich, N
dc.contributor.author	Pozhanka, Y
dc.contributor.author	Oberst, S https://orcid.org/0000-0002-1388-2749
dc.contributor.author	Wollmann, A
dc.contributor.author	Scheffler, M
dc.contributor.author	Powell, D
dc.contributor.author	Marburg, S
dc.date.accessioned	2020-10-16T21:58:54Z
dc.date.available	2020-10-16T21:58:54Z
dc.date.issued	2020-03-15
dc.identifier.citation	Journal of the Acoustical Society of America, 2020, 147, (3), pp. 1491-1491
dc.identifier.issn	0001-4966
dc.identifier.issn	1520-8524
dc.identifier.uri	http://hdl.handle.net/10453/143317
dc.description.abstract	Noise mitigation of stage machinery can be quite demanding and requires innovative solutions. In this work we propose an acoustic metamaterial capsule to reduce the noise emission of several stage machinery drive trains, while still allowing the ventilation required for cooling. The metamaterial capsule consists of c-shape meta atoms, which have a simple structure that facilitates manufacturing. We design, simulate, manufacture, and experimentally validate two different metamaterial capsules, which utilize an ultra-sparse and air-permeable reflective meta-grating. Both designs demonstrate transmission loss peaks that effectively suppress gear mesh noise or other narrow band noise sources. The ventilation by natural convection was numerically verified, and was shown to give adequate cooling, whereas a conventional sound capsule would lead to overheating. The noise spectra of three common stage machinery drive trains are numerically modelled, enabling us to design meta-gratings and determine their noise suppression performance. The results fulfill the stringent stage machinery noise limits, highlighting the benefit of using metamaterial capsule of simple c-shape structure.
dc.format	Print
dc.language	eng
dc.publisher	Acoustical Society of America
dc.relation	http://purl.org/au-research/grants/arc/DP200101708
dc.relation.ispartof	Journal of the Acoustical Society of America
dc.relation.isbasedon	10.1121/10.0000857
dc.rights	info:eu-repo/semantics/openAccess
dc.subject.classification	Acoustics
dc.title	Acoustic metamaterial capsule for reduction of stage machinery noise
dc.type	Journal Article
utslib.citation.volume	147
utslib.location.activity	United States
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney
utslib.copyright.status	open_access	*
pubs.consider-herdc	true
dc.date.updated	2020-10-16T21:58:30Z
pubs.issue	3
pubs.publication-status	Published
pubs.volume	147
utslib.citation.issue	3

Abstract:

Noise mitigation of stage machinery can be quite demanding and requires innovative solutions. In this work we propose an acoustic metamaterial capsule to reduce the noise emission of several stage machinery drive trains, while still allowing the ventilation required for cooling. The metamaterial capsule consists of c-shape meta atoms, which have a simple structure that facilitates manufacturing. We design, simulate, manufacture, and experimentally validate two different metamaterial capsules, which utilize an ultra-sparse and air-permeable reflective meta-grating. Both designs demonstrate transmission loss peaks that effectively suppress gear mesh noise or other narrow band noise sources. The ventilation by natural convection was numerically verified, and was shown to give adequate cooling, whereas a conventional sound capsule would lead to overheating. The noise spectra of three common stage machinery drive trains are numerically modelled, enabling us to design meta-gratings and determine their noise suppression performance. The results fulfill the stringent stage machinery noise limits, highlighting the benefit of using metamaterial capsule of simple c-shape structure.

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http://hdl.handle.net/10453/143317