Experimental demonstration of three-dimensional broadband underwater acoustic carpet cloak

We present the design, architecture, and detailed performance of a three-dimensional (3D) underwater acoustic carpet cloak (UACC). The proposed system of the 3D UACC is an octahedral pyramid, which is composed of periodical steel strips. This underwater acoustic device, placed over the target to hid...

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Bibliographic Details
Published in:Applied physics letters 2018-05, Vol.112 (22)
Main Authors: Bi, Yafeng, Jia, Han, Sun, Zhaoyong, Yang, Yuzhen, Zhao, Han, Yang, Jun
Format: Article
Language:English
Subjects:
Acoustics
Applied physics
Broadband
Structural steels
Underwater acoustics
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Summary:We present the design, architecture, and detailed performance of a three-dimensional (3D) underwater acoustic carpet cloak (UACC). The proposed system of the 3D UACC is an octahedral pyramid, which is composed of periodical steel strips. This underwater acoustic device, placed over the target to hide, is able to manipulate the scattered wavefront to mimic a reflecting plane. The effectiveness of the prototype is experimentally demonstrated in an anechoic tank. The measured acoustic pressure distributions show that the 3D UACC can work in all directions in a wide frequency range. This experimental verification of 3D device paves the way for guidelines on future practical applications.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.5026199