3D单端口Labelothine声学超材料
3D Single-port Labyrinthine Acoustic Metamaterial
摘要：
在本文中，我们报告的设计，制造和实验表征的3D单端口的超声波材料。通过使用一端封闭且内部具有适当损耗的卷曲穿孔，所提出的超材料可以完美地吸收低频带中的空气传播声音。频带的位置和宽度都可以灵活调整。发现了超材料的相对吸收带宽和厚度之间的折衷。当相对吸收带宽高达51%时，仍能满足深亚波长厚度（0.07λ）的要求。
英文摘要：
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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