The phenomenon of near-field concentration of sound wave plays an important role in harnessing of sound wave in underwater sonar or similar devices, where high pressure field is required. Material parameters for the metamaterial-assisted acoustic concentrators with arbitrary N-sided regular polygonal cross section are derived based on coordination transformation approach. Acoustic intensity enhancement of the concentrator has been shown by full-wave simulation. All theoretical and numerical results validate the generality and effectiveness of the proposed designing method.
Issue Section:
Research Papers
References
1.
Leonhardt
, U.
, 2006, “Optical Conformal Mapping
,” Science
, 312
(5781
), pp. 1777
–1780
.2.
Pendry
, J. B.
, Schurig
, D.
, and Smith
, D. R.
, 2006, “Controlling Electromagnetic Fields
,” Science
, 312
(5781), pp. 1780
–1782
.3.
Luo
, Y.
, Zhang
, J.
, Ran
, L.
, Chen
, H.
, and Kong
, J. A.
, 2008, “Controlling the Emission of Electromagnetic Source
,” Prog. Electromagn. Res. Symp.
, 4
(7
), pp. 795
–800
.4.
Yao
, S.
Zhou
, X.
, and Hu
, G.
, 2008, “Experimental Study on Negative Effective Mass in a 1D Mass-Spring System
,” New J. Phys.
, 10
(4
), p. 043020
.5.
Lee
, S. H.
, Park
, C. M.
, Seo
, Y. M.
, Wang
, Z. G.
, and Kim
, C. K.
, 2010, “Composite Acoustic Medium With Simultaneously Negative Density and Modulus
,” Phys. Rev. Lett.
, 104
(5
), p. 054301
.6.
Fang
, N.
, Xi
, D.
, Xu
, J.
, Ambati
, M.
, Srituravanich
, W.
, Sun
, C.
, and Zhang
, X.
, 2006, “Ultrasonic Metamaterials With Negative Modulus
,” Nature Mater.
, 5
(6
), pp. 452
–456
.7.
Baz
, A. M.
, 2010, “An Active Acoustic Metamaterial With Tunable Effective Density
,” J. Vibr. Acoust.
, 132
(4
), p. 041011
.8.
Chen
, H.
, and Chan
, C. T.
, 2007, “Acoustic Cloaking in Three Dimensions Using Acoustic Metamaterials
,” Appl. Phys. Lett.
, 91
(18
), p. 183518
.9.
Yang
, J. J.
, Huang
, M.
, Yang
, C. F.
, Peng
, J. H.
, and Chang
, J.
, 2010, “An External Acoustic Cloak With N-Sided Regular Polygonal Cross Section Based on Complementary Medium
,” Comput. Mater. Sci.
, 49
(1
), pp. 9
–14
.10.
11.
Guenneau
, S.
, Movchan
, A.
, Pétursson
, G.
, and Ramakrishna
, S. A.
, 2007, “Acoustic Metamaterials for Sound Focusing and Confinement
,” New J. Phys.
, 9
(11
), p. 399
.12.
Chen
, H. Y.
, Yang
, J.
, Zi
, J.
, and Chan
, C. T.
, 2009, “Transformation Media for Linear Liquid Surface Waves
,” Europhys. Lett.
, 85
(2
), p. 24004
.13.
Yang
, T.
, Cao
, R. F.
, Luo
, X. D.
, and Ma
, H. R.
, 2009, “Acoustic Superscatterer and Its Multilayer Realization
,” Appl. Phys. A: Mater. Sci. Process.
, 99
(4
), pp. 843
–847
.14.
Chen
, H.
, and Chan
, C. T.
, 2010, “Acoustic Cloaking and Transformation Acoustics
,” J. Phys. D: Appl. Phys.
, 43
(11
), p. 113001
.15.
Lin
, S.
, 2009, “Study on the Step-Type Circular Ring Ultrasonic Concentrator in Radial Vibration
,” Ultrasonics
, 49
(2
), pp. 206
–211
.16.
Nakamura
, T.
, Sato
, Y.
, Kamakura
, T.
, and Anada
, T.
, 2004, “Sound Pressure Fields Focused Using Biconcave Acoustic Lens for Normal Incidence
,” Jpn. J. Appl. Phys.
, 43
(1
), pp. 3163
–3168
.17.
Li
, J.
, Fok
, L.
, Yin
, X.
, Bartal
, G.
, and Zhang
, X.
, 2009, “Experimental Demonstration of an Acoustic Magnifying Hyperlens
,” Nature Mater.
, 8
(12
), pp. 931
–934
.18.
Lee
, S. H.
, Park
, C. M.
, Seo
, Y. M.
, Wang
, Z. G.
, and Kim
, C. K.
, 2009, “Acoustic Metamaterial With Negative Density
,” Phys. Lett. A
, 373
(48
), pp. 4464
–4469
.19.
Lee
, S. H.
, Park
, C. M.
, Seo
, Y. M.
, Wang
, Z. G.
, and Kim
, C. K.
, 2009, “Acoustic Metamaterial With Negative Modulus
,” J. Phys.: Condens. Matter
, 21
(17
), p. 175704
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