Locally resonant sonic materials

被引：265

作者：

Sheng, P ^{[1
]}

Zhang, XX ^{[1
]}

Liu, Z ^{[1
]}

Chan, CT ^{[1
]}

机构：

[1] Hong Kong Univ Sci & Technol, Dept Phys, Kowloon, Hong Kong, Peoples R China

来源：

PHYSICA B-CONDENSED MATTER | 2003年 / 338卷 / 1-4期

关键词：

localized resonance; negative elastic constants; elastic wave band gaps;

D O I：

10.1016/S0921-4526(03)00487-3

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We have fabricated a new type of composite which displays localized sonic resonances at similar to350-2000 Hz with a microstructure size in the millimeter to centimeter range. Around the resonance frequencies the composite behaves as a material with effective negative elastic constants and as a total wave reflector-a 2 cm slab of this material is shown to break the conventional mass-law of sound transmission by order(s) of magnitude. When the microstructure is periodic, our composites exhibit large elastic wave band gaps at the sonic frequency range, with a lattice constant order(s) of magnitude smaller than the corresponding sonic wavelength in air. Good agreement is obtained between theory and experiment. (C) 2003 Elsevier B.V. All rights reserved.

引用

页码：201 / 205

页数：5

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