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- W2008034863 abstract "We report the practical realization of phononic membrane with sub-wavelength apertures, inducing a broadband ultrasonic opacity. The ultrasonic experiments confirm the existence of deep and wide attenuation in the transmission spectrum, through periodic aperture arrays in silicon substrate immersed in water. This attenuation reaches 30 dB on a relative bandwidth of 31% with a center frequency of 0.9 MHz. The arrays act as Fabry-Perot acoustic resonators, and through the coupling effect between them, we obtain a series of asymmetric shape peaks in the transmission spectra. This leads to an enhanced transmission at the resonance frequencies as well as to improve the attenuation significantly at the antiresonance frequencies." @default.
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- W2008034863 date "2013-08-19" @default.
- W2008034863 modified "2023-10-18" @default.
- W2008034863 title "Experimental evidence of ultrasonic opacity using the coupling of resonant cavities in a phononic membrane" @default.
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- W2008034863 doi "https://doi.org/10.1063/1.4819021" @default.
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