科研之友
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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]
- 出版日期2011-11-7
- 单位南京大学
