3D Hilbert fractal acoustic metamaterials: Low-frequency and multi-band sound insulation

Man, XF; Xia, BZ; Luo, Z; Liu, J

3D Hilbert fractal acoustic metamaterials: Low-frequency and multi-band sound insulation

Man, XF

Xia, BZ Luo, Z

Liu, J

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Publication Type:: Journal Article
Citation:: Journal of Physics D: Applied Physics, 2019, 51 (19)
Issue Date:: 2019-01-01

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Field	Value	Language
dc.contributor.author	Man, XF https://orcid.org/0000-0002-4181-5885	en_US
dc.contributor.author	Xia, BZ	en_US
dc.contributor.author	Luo, Z https://orcid.org/0000-0002-6953-3986	en_US
dc.contributor.author	Liu, J	en_US
dc.date.available	2020-05-25T19:06:40Z
dc.date.issued	2019-01-01	en_US
dc.identifier.citation	Journal of Physics D: Applied Physics, 2019, 51 (19)	en_US
dc.identifier.issn	0022-3727	en_US
dc.identifier.uri	http://hdl.handle.net/10453/131903
dc.description.abstract	© 2019 IOP Publishing Ltd. In this work, we present a class of three-dimensional (3D) labyrinthine acoustic metamaterials with self-similar fractal technique, which can produce multiple frequency-band sound insulation in deep-subwavelength scale. By simultaneously exploiting the multi-frequency bandgaps and the low-frequency characteristics, the Hilbert cubes are explored to design the 3D Hilbert fractal acoustic metamaterials (HFAMs). The multiple-band features of the HFAMs are examined by the finite element method and the effective medium theory, in which the negative bulk modulus and the mass density are responsible for the formation of the multi-bandgaps. These multi-frequency properties are induced by the Fabry-Perot multi-resonance of 3D HFAMs, which possess an ultra-high refractive index. Hence, the multi-band sound insulations of 3D HFAMs with the negative effective property are achieved below 500 Hz. These properties of the designed 3D HFAMs provide an effective way for acoustic metamaterials to achieve multi-band filtering and noise attenuation in the low-frequency regime.	en_US
dc.relation	http://purl.org/au-research/grants/arc/DP160102491
dc.relation.ispartof	Journal of Physics D: Applied Physics	en_US
dc.relation.isbasedon	10.1088/1361-6463/ab092a	en_US
dc.rights	info:eu-repo/semantics/openAccess
dc.subject.classification	Applied Physics	en_US
dc.title	3D Hilbert fractal acoustic metamaterials: Low-frequency and multi-band sound insulation	en_US
dc.type	Journal Article
utslib.citation.volume	19	en_US
utslib.citation.volume	51	en_US
utslib.for	091307 Numerical Modelling and Mechanical Characterisation	en_US
utslib.for	02 Physical Sciences	en_US
utslib.for	09 Engineering	en_US
pubs.embargo.period	Not known	en_US
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.issue	19	en_US
pubs.publication-status	Published	en_US
pubs.volume	51	en_US

Abstract:

© 2019 IOP Publishing Ltd. In this work, we present a class of three-dimensional (3D) labyrinthine acoustic metamaterials with self-similar fractal technique, which can produce multiple frequency-band sound insulation in deep-subwavelength scale. By simultaneously exploiting the multi-frequency bandgaps and the low-frequency characteristics, the Hilbert cubes are explored to design the 3D Hilbert fractal acoustic metamaterials (HFAMs). The multiple-band features of the HFAMs are examined by the finite element method and the effective medium theory, in which the negative bulk modulus and the mass density are responsible for the formation of the multi-bandgaps. These multi-frequency properties are induced by the Fabry-Perot multi-resonance of 3D HFAMs, which possess an ultra-high refractive index. Hence, the multi-band sound insulations of 3D HFAMs with the negative effective property are achieved below 500 Hz. These properties of the designed 3D HFAMs provide an effective way for acoustic metamaterials to achieve multi-band filtering and noise attenuation in the low-frequency regime.

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http://hdl.handle.net/10453/131903