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- W4280492263 abstract "Acoustic and elastic metamaterials with space- and time-dependent material properties have received great attention recently as a means to realize nonreciprocal wave propagation. The nonreciprocal behavior of propagating waves in a spatiotemporally modulated infinite medium is usually characterized by directional bandgaps present in the frequency-wavenumber spectrum. However, less attention has been given to acoustic scattering from spatiotemporally modulated media. In this work, we consider nonreciprocal reflection and transmission from a spatiotemporally modulated, infinite elastic plate excited by a plane wave at oblique incidence. A semi-analytical approach is developed that considers the coupling between the acoustic waves and the displacement of the plate. The reflection and transmission response of the plate for each generated frequency harmonic as a function of the incident angle are reported. Finally, we find conditions on the modulation parameters that yield a large degree of nonreciprocity. The present analysis leads to potential applications in acoustic communications, such as directional wave sensing." @default.
- W4280492263 created "2022-05-22" @default.
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- W4280492263 date "2022-04-01" @default.
- W4280492263 modified "2023-09-30" @default.
- W4280492263 title "Nonreciprocal acoustic scattering from an elastic plate with spatiotemporally modulated material properties" @default.
- W4280492263 doi "https://doi.org/10.1121/10.0010958" @default.
- W4280492263 hasPublicationYear "2022" @default.
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