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Acoustic Metamaterial Absorbers
2021Porous and fibrous materials provide effective and broadband acoustic absorption at mid/high audible frequencies. However, these traditional treatments result in thick and heavy layers when designed for low frequency audible sound. To overcome these limitations, in the recent years metamaterials have been proposed as an alternative to design sub ...
Jean-Philippe Groby +2 more
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'Maxwellian' macroscopic acoustics and acoustic metamaterials
The Journal of the Acoustical Society of America, 2008For electromagnetic wave propagation it was found that there exist composite media exhibiting strong spatial dispersion. This has raised the question of the relevance of the spatial dispersion in the characterization of the new metamaterials. The present communication intends to show that exactly the same problematic occurs in acoustics when ...
Denis Lafarge, Aroune Duclos
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Science, 2013
Soft materials that embed small resonators in a host material can dampen or focus sound.
Brunet, Thomas +2 more
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Soft materials that embed small resonators in a host material can dampen or focus sound.
Brunet, Thomas +2 more
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2021
Bubbly metamaterials are created by exploiting the low-frequency Minnaert resonance of bubbles, and can radically modify acoustic wave behaviour. In this presentation, I will first review the properties of bubble metascreens, which consist of a single layer of bubbles in a soft solid, and can be very efficient absorbers of waterborne acoustic waves ...
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Bubbly metamaterials are created by exploiting the low-frequency Minnaert resonance of bubbles, and can radically modify acoustic wave behaviour. In this presentation, I will first review the properties of bubble metascreens, which consist of a single layer of bubbles in a soft solid, and can be very efficient absorbers of waterborne acoustic waves ...
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Nonlinear acoustic metamaterials
The Journal of the Acoustical Society of America, 2019Acoustic metamaterials (AMM) have become a very active topic for research in numerous domains of engineering and science because of their promise to create materials, structures, and devices that can control acoustic wave propagation in ways that exceed the capabilities of naturally occurring or conventional composite materials.
Samuel P. Wallen +2 more
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Active acoustic metamaterials.
The Journal of the Acoustical Society of America, 2010Extensive efforts are being exerted to develop various types of acoustic metamaterials to effectively control the flow of acoustical energy through these materials. However, all these efforts are focused on passive metamaterials with fixed material properties.
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Acoustic Metamaterial Wizardry
2020Acoustic metamaterials are non-naturally occurring structures consisting of arrays of sub-wavelength resonators designed to manipulate the propagation of sound, exhibiting effective negative density or modulus [1,2]. Counterintuitive metamaterial properties such as acoustic negative refraction, superlensing and cloaking have been demonstrated. Another
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Enhanced metamaterial vibration for high-performance acoustic piezoelectric energy harvesting
Composites Communications, 2022Weipeng Sun, Zhimiao Yan, Ting Tan
exaly
Metamaterial and Helmholtz coupled resonator for high-density acoustic energy harvesting
Nano Energy, 2021Ting Tan, Zhimiao Yan, Wei-Hsin Liao
exaly