Results 21 to 30 of about 3,581 (229)
Materials & Design, 2020 We constructed a three-dimensional fractal acoustic metamaterial using the combination of zigzag channels and Menger fractal structures that had high structural symmetry and could extend into 3D space easily. Reflection and transmission coefficients were
Yu Liu +7 more
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Negative acoustic index metamaterial [PDF]
, 2011 Acoustic metamaterials utilizing periodic deep subwavelength resonators can attain negative acoustic properties unavailable in nature. We have developed a negative acoustic index metamaterial for water that combines Helmholtz and rod-spring resonators to
X. Zhang, L. Fok, Zhang, X., Fok, L.
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Transmissive Labyrinthine Acoustic Metamaterial-Based Holography for Extraordinary Energy Harvesting. [PDF]
Adv Eng Mater, 2023 Conventional energy sources are continuously depleting, and the world is actively seeking new green and efficient energy solutions. Enormous amounts of acoustic energy are dissipated daily, but the low intensity and limited efficiency of current ...
Bansal S +5 more
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Archives of Acoustics, 2022 This review article is concerned with metamaterials, i.e. specifically engineered structures with special properties for interaction with sounds. The research on and practical design of these materials have gained momentum in the last decade, when 3D printing techniques provided the possibility to fabricate such geometrically complex structures.
Bartłomiej Sztyler, Paweł Strumiłło
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Acoustic Metamaterials and Acoustic Foams: Recent Advances [PDF]
Applied Sciences, 2022 Acoustic metamaterials are synthetic materials, made of repeating unit cells that are designed to address an acoustic problem, through the rational design of their micro-features [...]
Reza Hedayati, Mahdi Bodaghi
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Research on Low-Frequency Noise Control Based on Fractal Coiled Acoustic Metamaterials
Shock and Vibration, 2022 In this paper, a self-similar fractal coiled acoustic metamaterial is designed for the low-frequency noise control problem by combining a perforated plate and a coiled back cavity structure.
Hongyu Cui, Chengtao Liu, Haoming Hu
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Design, Manufacturing, and Acoustical Analysis of a Helmholtz Resonator-Based Metamaterial Plate
Acoustics, 2021 Acoustic metamaterials are materials artificially engineered to control sound waves, which is not possible with conventional materials. We have proposed a design of an acoustic metamaterial plate with inbuilt Helmholtz resonators.
Sourabh Dogra, Arpan Gupta
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An active viscoelastic metamaterial for isolation applications [PDF]
, 2014 Metamaterials are of interest due to their ability to produce novel acoustic behaviour beyond that seen in naturally occurring media. Of particular interest is the appearance of band gaps which lead to very high levels of attenuation within narrow ...
Reynolds, Matthew, Daley, Stephen
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Magnetoactive Acoustic Metamaterials
Advanced Materials, 2018 AbstractAcoustic metamaterials with negative constitutive parameters (modulus and/or mass density) have shown great potential in diverse applications ranging from sonic cloaking, abnormal refraction and superlensing, to noise canceling. In conventional acoustic metamaterials, the negative constitutive parameters are engineered via tailored structures ...
Kunhao, Yu +3 more
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Wide-Angle Broadband Nonreflecting Acoustic Metamaterial Fence [PDF]
, 2020 © 2020 American Physical Society. In this work, we theoretically propose and experimentally demonstrate a kind of nonreflecting acoustic metamaterial fence that is perfectly impedance matched to air over a wide range of incident angles and a broad ...
Fang, Nicholas X. +7 more
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