Results 21 to 30 of about 9,256 (180)
Acoustics, 2022 Significant potential for acoustic metamaterials to provide a breakthrough in sound attenuation has been unlocked in recent times due to advancements in additive manufacturing techniques.
Daniel Deery +4 more
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Broadband Acoustic Hyperbolic Metamaterial
Physical Review Letters, 2015 Acoustic metamaterials (AMMs) are engineered materials, made from subwavelength structures, that exhibit useful or unusual constitutive properties. There has been intense research interest in AMMs since its first realization in 2000 by Liu et al. A number of functionalities and applications have been proposed and achieved using AMMs.
Shen, Chen +5 more
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Double-negative acoustic metamaterial [PDF]
Physical Review E, 2004 We show here the existence of acoustic metamaterial, in which both the effective density and bulk modulus are simultaneously negative, in the true and strict sense of an effective medium. Our double-negative acoustic system is an acoustic analogue of Veselago's medium in electromagnetism, and shares many unique consequences, such as negative refractive
Li, Jensen Tsan Hang, Chan, Che Ting
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Retrieving effective acoustic impedance and refractive index for size mismatch samples
AIP Advances, 2022 In this paper, we have presented an analytical solution to extract the effective properties of acoustic metamaterials from the measured complex transmission and reflection coefficients when the metamaterial and impedance tube have different sizes.
Mohammad Javad Khodaei +3 more
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Low-frequency sound absorption performance of composite acoustic metamaterials with rotational labyrinth channels and micro-perforated panels [PDF]
AIP AdvancesIn this paper, a kind of novel acoustic metamaterial combined with a rotational labyrinth and a micro-perforated plate is designed. The design of the rotational labyrinth structure combined with micro-perforated plates endows the acoustic metamaterial ...
Xinxin Liu +4 more
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Multiple Scattering Formulation of Two Dimensional Acoustic and Electromagnetic Metamaterials [PDF]
, 2011 This work presents a multiple scattering formulation of two dimensional acoustic metamaterials. It is shown that in the low frequency limit multiple scattering allows us to define frequency-dependent effective acoustic parameters for arrays of both ...
Sánchez-Dehesa, José, Torrent, Daniel
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Horn-like space-coiling metamaterials toward simultaneous phase and amplitude modulation [PDF]
, 2018 Acoustic metasurfaces represent a family of planar wavefront-shaping devices garnering increasing attention due to their capacity for novel acoustic wave manipulation.
Anderson, Stephan +4 more
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A study on acoustic metamaterial to control reflection sound
Nihon Kikai Gakkai ronbunshu, 2017 Acoustic metamaterial can have arbitrary acoustic characteristics , and there is possibility to improve acoustic performance of any products dramatically. As metamaterial, many kind of types have been propounded and studied.
Yukihide NAGAYO +2 more
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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
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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
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