论文信息 - Design and measurements of a broadband two-dimensional acoustic lens

Design and measurements of a broadband two-dimensional acoustic lens

Wedescribethedesign,fabrication,andmeasurementofa2Dbroadbandgradientindexacousticlensinair.The index of refraction is tuned by controlling the dimensions of acoustic metamaterial unit cell inclusions designed through numerical simulations. The lens was fabricated in plastic through rapid prototyping stereolithography, and measurements of the sound field show good agreement with the theoretical lens performance. The broadband performance of the lens is confirmed for frequencies ranging from 1.5 kHz to 4.5 kHz.

[1] Andreas Håkansson,et al. Homogenization of two-dimensional clusters of rigid rods in air. , 2006, Physical review letters.

[2] J. Arriaga,et al. Speed of sound in periodic elastic composites. , 2003, Physical review letters.

[3] Steven A. Cummer,et al. Design and characterization of broadband acoustic composite metamaterials , 2009 .

[4] T. P. Martin,et al. Sonic gradient index lens for aqueous applications , 2010, 1006.3582.

[5] Daniel Torrent,et al. Effective parameters of clusters of cylinders embedded in a nonviscous fluid or gas , 2006 .

[6] Anqi Zhang,et al. Acoustic far-field focusing effect for two-dimensional graded negative refractive-index sonic crystals , 2010 .

[7] D. Torrent,et al. Acoustic metamaterials for new two-dimensional sonic devices , 2007 .

[8] Xiang Zhang,et al. Method for retrieving effective properties of locally resonant acoustic metamaterials , 2007 .

[9] Steven A. Cummer,et al. Design and measurements of a broadband two-dimensional acoustic metamaterial with anisotropic effective mass density , 2011 .

[10] Daniel Torrent,et al. Sound focusing by gradient index sonic lenses , 2010, 1006.2701.

[11] Tsung-Tsong Wu,et al. Gradient-index phononic crystals , 2009 .

[12] Carlos C. Gomez-Reino,et al. Gradient-index optics , 2002 .