Results 111 to 120 of about 3,555 (220)
Acoustic Cloaking of Moving Objects
, 2013 The paper describes a theoretical and numerical approach to the modeling of an acoustic meta- material for the cloaking of an object moving within a compressible medium and impinged by an acoustic perturbation due to sources co-moving with it.
IEMMA, Umberto
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Acoustic Transmission Characteristics Based on H-Type Metamaterials
IEEE Access, 2019 To achieve the artificial manipulation of the acoustic wave front, and to produce high-efficiency acoustic focusing effect, this paper designed an $H$ -type locally resonant metamaterial structure based on a two-dimensional three-component local ...
Shuai Tang, Jianning Han
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Applied SciencesAcoustic metamaterials (AMs) are artificially structured materials composed of subwavelength units that enable acoustic phenomena not achievable with conventional materials and structures.
Ju-Hee Lee +3 more
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Focusing ultrasound with an acoustic metamaterial network
, 2009 We present the first experimental demonstration of focusing ultrasound waves through a flat acoustic metamaterial lens composed of a planar network of subwavelength Helmholtz resonators.
Yin, Leilei, Zhang, Shu, Fang, Nicholas
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Modeling and investigation of a multi-resonant metamaterial sound insulator
Archives of AcousticsA design of multi-resonant acoustic metamaterial sound insulator is proposed to attenuate multi-tonal and broadband noise. The unit cell of the metamaterial consists of a porous material with four, nine, and sixteen embedded Helmholtz resonators and its
Zacharie Laly +3 more
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Recent Developments of Acoustic Energy Harvesting: A Review
Micromachines, 2019 Acoustic energy is a type of environmental energy source that can be scavenged and converted into electrical energy for small-scale power applications. In general, incident sound power density is low and structural design for acoustic energy harvesting ...
Ming Yuan +3 more
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Quasi-two-dimensional acoustic metamaterial with negative bulk modulus [PDF]
, 2012 We present the experimental realization and characterization of an acoustic metamaterial with negative bulk modulus. The metamaterial consists of a two-dimensional array of cylindrical cavities, and the bulk modulus is controlled by their radius size and
Cervera Moreno, Francisco Salvador +4 more
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AIP AdvancesOptimization of acoustic metamaterial structures and prediction of acoustic absorption properties have received much attention in various fields. This thesis aims to optimize and predict the acoustic absorption performance of quasi-Helmholtz acoustic ...
Jianxin Xu +3 more
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Prospects of acoustic metamaterials for acoustic stealth
Zhongguo Jianchuan Yanjiu, 2020 With the gradual realization of low frequency detection and other characteristics of sonar technology, the development of stealth technology is facing great challenges. Acoustic metamaterials are a new type of artificial composite materials with supernormal physical properties,which can suppress the propagation of large wavelength(low frequency ...
XU Weilong +3 more
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Extreme acoustic metamaterial by coiling up space
, 2012 We show that by coiling up space using curled perforations, a two-dimensional acoustic metamaterial can be constructed to give a frequency dispersive spectrum of extreme constitutive parameters, including double negativity, a density near zero, and a ...
Liang, Z. +3 more
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