Metasurface for Water-to-Air Sound Transmission

Eun Bok, Jong Jin Park, Haejin Choi, Chung Kyu Han, Oliver B. Wright, Sam H. Lee

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15 Citations (Scopus)

Abstract

Effective transmission of sound from water to air is crucial for the enhancement of the detection sensitivity of underwater sound. However, only 0.1% of the acoustic energy is naturally transmitted at such a boundary. At audio frequencies, quarter-wave plates or multilayered antireflection coatings are too bulky for practical use for such enhancement. Here we present an acoustic metasurface of a thickness of only ∼λ/100, where λ is the wavelength in air, consisting of an array of meta-atoms that each contain a set of membranes and an air-filled cavity. We experimentally demonstrate that such a meta-atom increases the transmission of sound at ∼700 Hz by 2 orders of magnitude, allowing about 30% of the incident acoustic power from water to be transmitted into air. Applications include underwater sonic sensing and communication.

Original languageEnglish
Article number044302
JournalPhysical Review Letters
Volume120
Issue number4
DOIs
Publication statusPublished - 2018 Jan 26

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All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Bok, E., Park, J. J., Choi, H., Han, C. K., Wright, O. B., & Lee, S. H. (2018). Metasurface for Water-to-Air Sound Transmission. Physical Review Letters, 120(4), [044302]. https://doi.org/10.1103/PhysRevLett.120.044302