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Perfect Undetectable Acoustic Device from Fabry-Pérot Resonances
Phys. Rev. Applied 9, 024014 – Published 14 February, 2018
DOI: https://doi.org/10.1103/PhysRevApplied.9.024014
Abstract
Transformation acoustics is a method to design novel acoustic devices, while the complexity of the material parameters hinders its progress. In this paper, we analytically present a three-dimensional perfect undetectable acoustic device from Fabry-Pérot resonances and confirm its functionality from Mie theory. Such a mechanism goes beyond the traditional transformation acoustics. In addition, such a reduced version can be realized by holey-structured metamaterials. Our theory paves a way to the implementation of three-dimensional transformation acoustic devices.
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