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arXiv · 1608.04599

3D Single-port Labyrinthine Acoustic Metamaterial

Chi Zhang·Xinhua Hu
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Abstract

In this paper, we report on the design, fabrication, and experimental characterization of a 3D single-port labyrinthine acoustic metamaterial. By using curled perforations with one end closed and with appropriate loss inside, the proposed metamaterial can perfectly absorb airborne sounds in a low frequency band. Both the position and width of the band can be tuned flexibly. A tradeoff is uncovered between the relative absorption bandwidth and thickness of the metamaterial. When the relative absorption bandwidth is as high as 51%, the requirement of deep subwavelength thickness (0.07λ) can still be satisfied.

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Chi Zhang, Xinhua Hu. 2016-08-11. 3D Single-port Labyrinthine Acoustic Metamaterial. https://doi.org/10.1103/physrevapplied.6.064025

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