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- W4384432064 abstract "In our previous work, we have shown that nonlocal interactions in acoustic metamaterials can lead to highly unusual roton-like dispersion relations exhibiting a minimum of frequency versus wavenumber similar to that of superfluid Helium-4. However, this behavior was limited to only one or two propagation directions of sound. Here, we design a three-dimensional cubic-symmetry airborne acoustic metamaterial with nonlocal interactions along three orthogonal directions. By using numerical finite-element calculations, we show that the metamaterial supports roton-like behavior along all three orthogonal directions, but the behavior is far from isotropic. We compare these calculations with a simplified semi-analytical model, leading to good overall agreement. Corresponding experiments appear in reach, but are demanding due to the required dense and complex three-dimensional network of acoustic channels that connect compartments of air." @default.
- W4384432064 created "2023-07-16" @default.
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- W4384432064 date "2023-07-01" @default.
- W4384432064 modified "2023-09-25" @default.
- W4384432064 title "Cubic-symmetry acoustic metamaterials with roton-like dispersion relations" @default.
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- W4384432064 doi "https://doi.org/10.1007/s10409-023-23020-x" @default.
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