Subwavelength acoustic monopole source emission enhancement through dual gratings

Jun Mei, Ying Wu

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

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.
Original languageEnglish (US)
JournalScientific Reports
Volume9
Issue number1
DOIs
StatePublished - Aug 12 2019

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