Experimental acoustic ground cloak in air.

Published

Journal Article

We present the design, fabrication, and performance analysis for a class of two-dimensional acoustic cloaking coatings in air. Our approach takes advantage of transformation acoustics and linear coordinate transformations that result in shells which are homogeneous, broadband, and compact. The required material parameters are highly anisotropic; however, we show that they are easily achievable in practice in metamaterials made of perforated plastic plates. The good performance of the fabricated design is assessed from measurements of the sound field produced around the cloak by a broadband source. The remarkably low complexity of the device made of perforated plastic plates shows that sound in air can be fully and effectively manipulated using realizable transformation acoustics devices.

Full Text

Duke Authors

Cited Authors

  • Popa, B-I; Zigoneanu, L; Cummer, SA

Published Date

  • June 22, 2011

Published In

Volume / Issue

  • 106 / 25

Start / End Page

  • 253901 -

PubMed ID

  • 21770640

Pubmed Central ID

  • 21770640

Electronic International Standard Serial Number (EISSN)

  • 1079-7114

International Standard Serial Number (ISSN)

  • 0031-9007

Digital Object Identifier (DOI)

  • 10.1103/physrevlett.106.253901

Language

  • eng