Results 31 to 40 of about 9,574 (206)
Time-domain imaging of gigahertz surface waves on an acoustic metamaterial
New Journal of Physics, 2018 We extend time-domain imaging in acoustic metamaterials to gigahertz frequencies. Using a sample consisting of a regular array of ∼1 μ m diameter silica microspheres forming a two-dimensional triangular lattice on a substrate, we implement an ultrafast ...
Paul H Otsuka +9 more
doaj +1 more source
, 2011 An investigation has been undertaken into acoustic iridescence, exploring how a device can be constructed which alter sound waves, in a similar way to structures in nature that act on light to produce optical iridescence.
Cox, TJ
core +1 more source
Metamaterials for simultaneous acoustic and elastic bandgaps
Scientific Reports, 2021 In this work, we present a single low-profile metamaterial that provides bandgaps of acoustic and elastic waves at the same time. This was done by ensuring impedance mismatch in two different domains, the fluid domain where the acoustic waves propagate ...
Waiel Elmadih +2 more
doaj +1 more source
Slow waves in locally resonant metamaterials line defect waveguides [PDF]
, 2016 In the past decades, many efforts have been devoted to the temporal manipulation of waves, especially focusing on slowing down their propagation. In electromagnetism, from microwave to optics, as well as in acoustics or for elastic waves, slow wave ...
Berthelot, Thomas +5 more
core +4 more sources
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
doaj +1 more source
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
doaj +1 more source
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
doaj +1 more source
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
core +1 more source
Generalized analytic model for rotational and anisotropic metasolids [PDF]
, 2017 An analytical approach is presented to model a metasolid accounting for anisotropic effects and rotational mode. The metasolid is made of either cylindrical or spherical hard inclusions embedded in a stiff matrix via soft claddings, and the analytical ...
Favier, Elie +3 more
core +2 more sources
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
doaj +1 more source