Results 11 to 20 of about 13,339 (215)
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 ...
Bartłomiej Sztyler, Paweł Strumiłło
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Acoustic Metamaterials in Aeronautics [PDF]
Applied Sciences, 2018 Metamaterials, man-made composites that are scaled smaller than the wavelength, have demonstrated a huge potential for application in acoustics, allowing the production of sub-wavelength acoustic absorbers, acoustic invisibility, perfect acoustic mirrors
Giorgio Palma +4 more
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Underwater acoustic metamaterials. [PDF]
Natl Sci Rev, 2023 Abstract Acoustic metamaterials have been widely investigated over the past few decades and have realized acoustic parameters that are not achievable using conventional materials. After demonstrating that locally resonant acoustic metamaterials are capable of acting as subwavelength unit cells, researchers have evaluated the possibility ...
Dong E +5 more
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Journal of Applied Physics, 2021 Waves are generally characterized by angular frequency ω and wavevector k. Accordingly, this tutorial is structured into two parts, one on resonance-based acoustic metamaterials, in the frequency domain, and one on topological acoustics, based on the wavevector domain as topological structures inherently involve spatial configurations that are a step ...
Jensen Li, Xinhua Wen, Ping Sheng
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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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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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Moth wings are acoustic metamaterials. [PDF]
Proc Natl Acad Sci U S A, 2020 Significance Bats and moths are embroiled in an evolutionary arms race. Using ultrasonic biosonar, bats detect their insect prey, which in turn deploy diverse strategies to avoid predation. Here, we show that some moth species evolved wings covered with a canopy of scales that reduces ultrasonic echoes. Our empirical and mathematical analysis
Neil TR +4 more
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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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Physics Today, 2016 By incorporating novel subwavelength structures into macroscopic materials, acousticians can create devices with exotic sound-altering properties.
Michael R. Haberman, Matthew D. Guild
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Crystals, 2020 In the past two decades, acoustic metamaterials have garnered much attention owing to their unique functional characteristics, which are difficult to find in naturally available materials. The acoustic metamaterials have demonstrated excellent acoustical
Sanjay Kumar, Heow Pueh Lee
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