Publications [#283139] of Steven A. Cummer

Papers Published

1. Popa, B-I; Zigoneanu, L; Cummer, SA, Experimental acoustic ground cloak in air., Physical Review Letters, vol. 106 no. 25 (June, 2011), pp. 253901 [21770640], [doi]
   (last updated on 2023/06/01)

   Abstract:
   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.