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2d And 3d Acoustic Metamaterials Using Space Coil Design

Published online by Cambridge University Press:  11 February 2015

Santosh K. Maurya,
Manu Sahay,
Shobha Shukla and
Sumit Saxena
Santosh K. Maurya
Affiliation:
Nanostructure Engineering and Modeling Laboratory Department of Metallurgical Engineering and Materials Science Indian Institute of Technology Bombay Mumbai, 400076
Manu Sahay
Affiliation:
Nanostructure Engineering and Modeling Laboratory Department of Metallurgical Engineering and Materials Science Indian Institute of Technology Bombay Mumbai, 400076
Shobha Shukla
Affiliation:
Nanostructure Engineering and Modeling Laboratory Department of Metallurgical Engineering and Materials Science Indian Institute of Technology Bombay Mumbai, 400076
Sumit Saxena
Affiliation:
Nanostructure Engineering and Modeling Laboratory Department of Metallurgical Engineering and Materials Science Indian Institute of Technology Bombay Mumbai, 400076
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Abstract

Various promising applications such as acoustic cloaking, sub-wavelength imaging, acoustic wave manipulation, transmission or reflection control etc. are feasible because of the ability of manipulating sounds and vibrations using artificially engineered “Acoustics meta-materials”. Recent works on space-coiling acoustic metamaterials show their extreme constitutive parameters like large refractive index, double negativity and zero mass density. Three dimensional structures have a wide application in sub-wavelength broadband acoustic wave suppression due to huge attenuation. Here we report the study of propagated and transmitted wave through 3D acoustic metamaterials structure using finite element method. Our simulations on 3D structure show a huge absorption/damping over few hundreds kilohertz frequency range.

Keywords

acousticstructuralsimulation

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