Results 31 to 40 of about 9,256 (180)
Mitigating Inaudible Ultrasound Attacks on Voice Assistants With Acoustic Metamaterials
IEEE Access, 2023 Voice assistants play an important role in facilitating human–machine interactions and have been widely used in audio consumer electronic products.
Joshua S. Lloyd +3 more
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Synthetic Pseudo-Spin-Hall effect in acoustic metamaterials
Nature Communications, 2022 Controlling emission and propagation of acoustic waves offers new design opportunities for acoustic devices. Here the authors demonstrate such controls thanks to the emergence of a synthetic pseudo-spin in two-dimensional acoustic metamaterial.
Matthew Weiner +3 more
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Acoustic metamaterials with coupled local resonators for broadband vibration suppression
AIP Advances, 2017 This paper investigates a modified acoustic metamaterial system with local resonators coupled through linear springs. The proposed acoustic metamaterial system can provide three band gaps for broadband vibration suppression.
Guobiao Hu +4 more
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Advances in Condensed Matter Physics, 2018 There has been an explosion of interest in acoustic metamaterial in the last ten years. The tunable negative acoustic metamaterial is an important issue for designing metamaterials.
Xiao-Le Yan +3 more
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Stimulated Brillouin scattering in metamaterials
, 2016 We compute the SBS gain for a metamaterial comprising a cubic lattice of dielectric spheres suspended in a background dielectric material. Theoretical methods are presented to calculate the optical, acoustic, and opto-acoustic parameters that describe ...
de Sterke, C. Martijn +5 more
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Reconfigurable ultra-sparse ventilated metamaterial absorber
APL Materials, 2023 The impetus for examining ventilated acoustic metamaterials stems from the demand for increasingly efficient and adaptable noise reduction and sound wave manipulation techniques.
Yangsong Ye +6 more
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Reverse Doppler Effect of Sound
, 2009 We report observation of reverse Doppler effect in a double negative acoustic metamaterial. The metamaterial exhibited negative phase velocity and positive group velocity.
C. Caloz +6 more
core +1 more source
Acoustic Willis meta-atom beyond the bounds of passivity and reciprocity
Communications Physics, 2021 Metamaterials are designed to control unconventional wave properties in acoustic systems with a range of applications such as acoustic cloaking. Here, the authors design an active acoustic Willis metamaterial that can realize decoupled polarizabilities ...
Choonlae Cho +3 more
doaj +1 more source
Acoustic Supercoupling in a Zero-Compressibility Waveguide
, 2018 Funneling acoustic waves through largely mismatched channels is of fundamental importance to tailor and transmit sound for a variety of applications. In electromagnetics, zero-permittivity metamaterials have been used to enhance the coupling of energy in
Alù, A. +3 more
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Enhanced acoustic transmission through a slanted grating [PDF]
, 2015 It is known that an acoustic wave incident on an infinite array of aligned rectangular blocks of a different acoustic material exhibits total transmission if certain conditions are met [1] which relate the unique "intromission" angle of incidence with ...
Norris, Andrew N., Su, Xiaoshi
core +2 more sources