A broadband acoustic omnidirectional absorber comprising positive-index materials

被引：76

作者：

Li, Rui-Qi ^{[1
]}

Zhu, Xue-Feng ^{[1
]}

Liang, Bin ^{[1
]}

Li, Yong ^{[1
]}

Zou, Xin-Ye ^{[1
]}

Cheng, Jian-Chun ^{[1
]}

机构：

[1] Nanjing Univ, Inst Acoust, Dept Phys, Key Lab Modern Acoust,MOE, Nanjing 210093, Peoples R China

来源：

APPLIED PHYSICS LETTERS | 2011年 / 99卷 / 19期

基金：

中国国家自然科学基金;

关键词：

PROPAGATION;

D O I：

10.1063/1.3659690

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We propose a broadband acoustic omnidirectional absorber (AOA) made of acoustic metamaterials having a positive index, which guides an incident acoustic wave into a central cavity spirally without backscattering. Numerical simulations show that the AOA has an absorption cross section remarkably larger than its cavity within a broad band, which is of potential practical significance to various applications such as sound absorption and noise control. A possible scheme for the practical realization of the AOA is also briefly discussed. VC 2011 American Institute of Physics. [doi: 10.1063/1.3659690]

引用

页数：3

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