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- W4385964480 abstract "The mismatch of acoustic impedance at water-air interface can lead a low transmitted sound energy. In this paper, we propose a discrete metasurface for extreme sound transmission based on the impedance matching theory. By employing topology optimization, discrete unit cells with different aspect ratios are designed with unitary sound transmission. The unit cell of continuous metasurface is also obtained for comparison. After analyzing the wide-angle performance of discrete unit cells, samples of both discrete and continuous metasurfaces are fabricated. Sound transmission enhancement of discrete metasurface is clearly measured compared to the bare water-air interface. And the amplitude is relatively larger than that of the continuous sample. Experimental results are in general agreement with numerical ones when viscosity of the sample is considered. Furthermore, the frequency shifts between experiment and simulation are attributed to the random immersion of unit cells for discrete metasurface and the bending of continuous metasurface, respectively. The present work suggests an alternative way for improving the efficiency of water-air acoustic communication." @default.
- W4385964480 created "2023-08-18" @default.
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- W4385964480 date "2023-08-02" @default.
- W4385964480 modified "2023-09-23" @default.
- W4385964480 title "Discrete metasurface for extreme sound transmission through water-air interface" @default.
- W4385964480 doi "https://doi.org/10.48550/arxiv.2308.01043" @default.
- W4385964480 hasPublicationYear "2023" @default.
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