Subwavelength acoustic monopole source emission enhancement through dual gratings

Type
Article

Authors
Mei, Jun
Wu, Ying

KAUST Department
Applied Mathematics and Computational Science Program
Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division

KAUST Grant Number
BAS/1/1626-01-01
OSR-2016-CRG5-2950

Online Publication Date
2019-08-12

Print Publication Date
2019-12

Date
2019-08-12

Abstract
Acoustic source emission rate is generally low at low frequencies. In this work, we propose a simple design of ‘LEGO’-type acoustic metamaterial that can significantly enhance the low frequency emission rate of an acoustic monopole source. Such enhancement is resulted from the coupling between resonances of a cavity and a dual grating comprised of two concentric layers of periodically distributed narrow slits. We develop an effective medium model to characterize the enhancement. Because of its simple structure, the metamaterial is easy to fabricate and thus facilitates the applications in various domains such as oil exploration.

Citation
Mei, J., & Wu, Y. (2019). Subwavelength acoustic monopole source emission enhancement through dual gratings. Scientific Reports, 9(1). doi:10.1038/s41598-019-48215-z

Acknowledgements
This work was supported by the National Natural Science Foundation of China (Grant Nos 11274120 and 11574087), King Abdullah University of Science and Technology (KAUST) Office of Sponsored Research (OSR) under Award No. OSR-2016-CRG5-2950 and Baseline Research Fund BAS/1/1626-01-01.

Publisher
Springer Nature

Journal
Scientific Reports

DOI
10.1038/s41598-019-48215-z

Additional Links
http://www.nature.com/articles/s41598-019-48215-z

Permanent link to this record