Ultrathin ultralight acoustic cloak

[摘要] Existing designs of transformation acoustic cloaks are not easy to implement in many practical situations because of their large dimensions, while scattering cancellation cloaks do not protect the inner cloak volume. Here, we report implementation of an acoustic metamaterial exhibiting “infinite cylinder-like” dispersion in an ultrathin (~1 mm) and ultralightweight (~3 g) acoustic cloak design intended to protect a human-head-size object in air, which combines scattering cancellation in the far-field with efficient sound proofing of the inner cloak volume.

[学科分类] 电子与电气工程

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