A new type of artificial structure to achieve broadband omnidirectional acoustic absorption

Zheng, L.-Y.; Wu, Ying; Zhang, X.-L.; Ni, X.; Chen, Z.-G.; Lu, M.-H.; Chen, Y.-F.

A new type of artificial structure to achieve broadband omnidirectional acoustic absorption

Files

Article-AIP_Advanc-A_new_type-2013-10-18.pdf (1.1 MB)

License

http://creativecommons.org/licenses/by/3.0/

Type

Article

Authors

Zheng, L.-Y.
Wu, Ying

Zhang, X.-L.
Ni, X.
Chen, Z.-G.
Lu, M.-H.
Chen, Y.-F.

KAUST Department

Applied Mathematics and Computational Science Program
Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
Waves in Complex Media Research Group

Online Publication Date

2013-10-18

Print Publication Date

2013-10

Date

2013-10-18

Abstract

We present a design for a two-dimensional omnidirectional acoustic absorber that can achieve 98.6% absorption of acoustic waves in water, forming an effective acoustic black hole. This artificial black hole consists of an absorptive core coated with layers of periodically distributed polymer cylinders embedded in water. Effective medium theory describes the response of the coating layers to the acoustic waves. The polymer parameters can be adjusted, allowing practical fabrication of the absorber. Since the proposed structure does not rely on resonances, it is applicable to broad bandwidths. The design might be extended to a variety of applications.

Citation

Zheng L-Y, Wu Y, Zhang X-L, Ni X, Chen Z-G, et al. (2013) A new type of artificial structure to achieve broadband omnidirectional acoustic absorption. AIP Advances 3: 102122. doi:10.1063/1.4826610.