宽带，在滑行对称蜿蜒通道表面上的慢声。

Broadband, slow sound on a glide-symmetric meander-channel surface.

作者信息

Beadle J G, Hooper I R, Sambles J R, Hibbins A P

机构信息

Electromagnetic and Acoustic Materials Group, Department of Physics and Astronomy, Physics Building, Stocker Road, University of Exeter, Exeter, EX4 4QL, United Kingdom.

出版信息

J Acoust Soc Am. 2019 May;145(5):3190. doi: 10.1121/1.5109549.

DOI:10.1121/1.5109549

PMID:31153334

Abstract

The acoustic surface waves supported by hard surfaces patterned with repeat-period, meandering grooves are explored. The single, continuous groove forms a glide-symmetric surface, inhibiting the formation of a bandgap at the first Brillouin-zone boundary. Consequently, the acoustic surface waves exhibit an almost constant, sub-speed-of-sound, group velocity over a broad frequency band. Such slow, broadband modes may have applications in controlling the flow of noise over surfaces.

摘要

研究了由具有重复周期、蜿蜒沟槽的硬表面所支持的声表面波。单个连续沟槽形成了一个滑移对称表面，抑制了在第一布里渊区边界处带隙的形成。因此，声表面波在很宽的频带上呈现出几乎恒定的、低于声速的群速度。这种缓慢的宽带模式可能在控制表面噪声流动方面有应用。