Directional sound beam emission from a configurable compact multisource system

被引：19

作者：

Zhao, Jiajun ^{[1
,2
]}

Al Jadhali, Rasha ^{[1
]}

Zhang, Likun ^{[3
,4
]}

Wu, Ying ^{[1
]}

机构：

[1] KAUST, Div Comp Elect & Math Sci & Engn, Thuwal 239556900, Saudi Arabia

[2] GOWell Int LLC, Houston, TX 77041 USA

[3] Univ Mississippi, Natl Ctr Phys Acoust, University, MS 38677 USA

[4] Univ Mississippi, Dept Phys & Astron, University, MS 38677 USA

来源：

SCIENTIFIC REPORTS | 2018年 / 8卷

关键词：

Monopole Source; High Directivity; Beamforming Steering; Source Layout; Effective Medium Model;

D O I：

10.1038/s41598-017-16792-6

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

We propose to achieve efficient emission of highly directional sound beams from multiple monopole sources embedded in a subwavelength enclosure. Without the enclosure, the emitted sound fields have an indistinguishable or omnidirectional radiation directivity in far fields. The strong directivity formed in the presence of the enclosure is attributed to interference of sources under degenerate Mie resonances in the enclosure of anisotropic property. Our numerical simulations of sound emission from the sources demonstrate the radiation of a highly directed sound beam of unidirectional or bidirectional patterns, depending on how the sources are configured inside the enclosure. Our scheme, if achieved, can solve the challenging problem of poor directivity of a subwavelength sound system, and can guide beam forming and collimation by miniaturized devices.

引用

页数：8

共 33 条

[1] High transmission acoustic focusing by impedance-matched acoustic meta-surfaces
Al Jahdali, Rasha
Wu, Ying
[J]. APPLIED PHYSICS LETTERS, 2016, 108 (03)
[2] [Anonymous], 2011, AC MOD US GUID VERS
[3] Development of a directivity-controlled piezoelectric transducer for sound reproduction
Bedard, Magella
Berry, Alain
[J]. JOURNAL OF SOUND AND VIBRATION, 2008, 311 (3-5) : 1271 - 1285
[4] Bies D., 2009, ENG NOISE CONTROL TH
[5] Blackstock D., 2000, Fundamentals of physical acoustics
[6] Positive, negative, zero refraction, and beam splitting in a solid/air phononic crystal: Theoretical and experimental study
Bucay, J.
Roussel, E.
Vasseur, J. O.
Deymier, P. A.
Hladky-Hennion, A-C.
Pennec, Y.
Muralidharan, K.
Djafari-Rouhani, B.
Dubus, B.
[J]. PHYSICAL REVIEW B, 2009, 79 (21)
[7] High refractive-index sonic material based on periodic subwavelength structure
Cai, Feiyan
Liu, Fengming
He, Zhaojian
Liu, Zhengyou
[J]. APPLIED PHYSICS LETTERS, 2007, 91 (20)
[8] Formation of collimated sound beams by three-dimensional sonic crystals
Cebrecos, A.
Romero-Garcia, V.
Pico, R.
Perez-Arjona, I.
Espinosa, V.
Sanchez-Morcillo, V. J.
Staliunas, K.
[J]. JOURNAL OF APPLIED PHYSICS, 2012, 111 (10)
[9] Cheng Y, 2015, NAT MATER, V14, P1013, DOI [10.1038/NMAT4393, 10.1038/nmat4393]
[10] Fan X.-D., 2017, ARXIV170207277

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