Acoustic cloak based on Bézier scatterers

Abstract Among the different approaches proposed to design acoustic cloaks, the one consisting on the use of an optimum distribution of discrete scatters surrounding the concealing object has been successfully tested. The feasibility of acoustic cloaks mainly depends on the number and shape of the s...

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Autores principales:	Zhimiao Lu, Lorenzo Sanchis, Jihong Wen, Li Cai, Yafeng Bi, José Sánchez-Dehesa
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2018
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/045e6a27398443628d35e32ee0cf34d6
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id	oai:doaj.org-article:045e6a27398443628d35e32ee0cf34d6
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spelling	oai:doaj.org-article:045e6a27398443628d35e32ee0cf34d62021-12-02T15:08:51ZAcoustic cloak based on Bézier scatterers10.1038/s41598-018-30888-72045-2322https://doaj.org/article/045e6a27398443628d35e32ee0cf34d62018-08-01T00:00:00Zhttps://doi.org/10.1038/s41598-018-30888-7https://doaj.org/toc/2045-2322Abstract Among the different approaches proposed to design acoustic cloaks, the one consisting on the use of an optimum distribution of discrete scatters surrounding the concealing object has been successfully tested. The feasibility of acoustic cloaks mainly depends on the number and shape of the scatterers surrounding the object to be cloaked. This work presents a method allowing the reduction of the number of discrete scatterers by optimizing their external shape, which is here defined by a combination of cubic Bézier curves. Based on scattering cancellation, a two-dimensional directional cloak consisting of just 20 Bézier scatters has been designed, fabricated and experimentally characterized. The method of fundamental solutions has been implemented to calculate the interaction of an incident plane wave with scatterers of arbitrary shape. The acoustic cloak here proposed shows a performance, in terms of averaged visibility, similar to that consisting of 120 scatterers with equal circular cross sections. The operational frequency of the proposed cloak is 5940 Hz with a bandwidth of about 110 Hz.Zhimiao LuLorenzo SanchisJihong WenLi CaiYafeng BiJosé Sánchez-DehesaNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 8, Iss 1, Pp 1-10 (2018)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Zhimiao Lu Lorenzo Sanchis Jihong Wen Li Cai Yafeng Bi José Sánchez-Dehesa Acoustic cloak based on Bézier scatterers
description	Abstract Among the different approaches proposed to design acoustic cloaks, the one consisting on the use of an optimum distribution of discrete scatters surrounding the concealing object has been successfully tested. The feasibility of acoustic cloaks mainly depends on the number and shape of the scatterers surrounding the object to be cloaked. This work presents a method allowing the reduction of the number of discrete scatterers by optimizing their external shape, which is here defined by a combination of cubic Bézier curves. Based on scattering cancellation, a two-dimensional directional cloak consisting of just 20 Bézier scatters has been designed, fabricated and experimentally characterized. The method of fundamental solutions has been implemented to calculate the interaction of an incident plane wave with scatterers of arbitrary shape. The acoustic cloak here proposed shows a performance, in terms of averaged visibility, similar to that consisting of 120 scatterers with equal circular cross sections. The operational frequency of the proposed cloak is 5940 Hz with a bandwidth of about 110 Hz.
format	article
author	Zhimiao Lu Lorenzo Sanchis Jihong Wen Li Cai Yafeng Bi José Sánchez-Dehesa
author_facet	Zhimiao Lu Lorenzo Sanchis Jihong Wen Li Cai Yafeng Bi José Sánchez-Dehesa
author_sort	Zhimiao Lu
title	Acoustic cloak based on Bézier scatterers
title_short	Acoustic cloak based on Bézier scatterers
title_full	Acoustic cloak based on Bézier scatterers
title_fullStr	Acoustic cloak based on Bézier scatterers
title_full_unstemmed	Acoustic cloak based on Bézier scatterers
title_sort	acoustic cloak based on bézier scatterers
publisher	Nature Portfolio
publishDate	2018
url	https://doaj.org/article/045e6a27398443628d35e32ee0cf34d6
work_keys_str_mv	AT zhimiaolu acousticcloakbasedonbezierscatterers AT lorenzosanchis acousticcloakbasedonbezierscatterers AT jihongwen acousticcloakbasedonbezierscatterers AT licai acousticcloakbasedonbezierscatterers AT yafengbi acousticcloakbasedonbezierscatterers AT josesanchezdehesa acousticcloakbasedonbezierscatterers
_version_	1718387980412911616

Acoustic cloak based on Bézier scatterers

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