Results 21 to 30 of about 2,673 (256)
Omindirectional Non-Reciprocity via 2D Modulated Radial Sonic Crystals
Crystals, 2020 In this paper we report on nonreciprocal wave propagation in a 2D radial sonic crystal with space–time varying properties. We show that a modulation traveling along the radial direction reflects in omni-directional and isotropic nonreciprocal wave ...
Davide Enrico Quadrelli +3 more
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Sonic crystal lenses that obey the lensmaker's formula [PDF]
Journal of Physics D: Applied Physics, 2004 4 pages, 5 ...
Kuo, Chao-Hsien, Ye, Zhen
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Acoustic topological insulator by honeycomb sonic crystals with direct and indirect band gaps
New Journal of Physics, 2018 We report both experimentally and numerically that a flow-free pseudospin-dependent acoustic topological insulator (ATI) is realized by two honeycomb sonic crystals with direct and indirect band gaps.
Ding Jia +5 more
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Multiple One-Way Edge Modes in Sonic Crystals With Large Chern Numbers
Frontiers in Physics, 2022 The quantum Hall effect (QHE) associated with Chern insulators reveals the non-trivial topological properties of two-dimensional electronic systems subject to strong magnetic field, which features finite Chern number C and chiral edge states.
Han Zhao +7 more
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Nihon Kikai Gakkai ronbunshu, 2015 Various soundproof wall have been developed for noise reduction. This paper experimentally investigated the performance of broad band noise reduction by pseudo periodic soundproof forest by placing trees on the shape of Penrose tile.
Yuichi MATSUMURA +2 more
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Two-dimensional sonic crystals with Helmholtz resonators [PDF]
Physical Review E, 2005 We present a type of sonic crystal composed with an array of two-dimensional Helmholtz resonators, which in the long-wave regime have both a high relative acoustic refractive index n and at the same time, a small acoustic impedance Z mismatch with air for airborne sound.
Hu, Xinhua, Chan, Che Ting, Zi, Jian
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Archives of AcousticsRecent years have seen a growing interest in the potential for the use of sonic crystals as noise barriers. The frequencies with the highest attenuation can be determined by assuming that an integer number of half wavelengths fits the distance between ...
Jan RADOSZ
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Multiple refraction switches realized by stretching elastomeric scatterers in sonic crystals
AIP Advances, 2015 The effect of out-of-plane pre-stretch on the 2D sonic crystal with stretchable elastomeric scatterers is explored. The hyperelastic scatterers are characterized by a compressible neo-Hookean model. The Dirichlet-to-Neumann (DtN) map is adopted to obtain
Y. Huang +3 more
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Tunable acoustic hooks from Janus cylinder
Results in Physics, 2021 In this paper we present a new way to obtain tunable acoustic hooks. The breaking of the symmetry of the material composition is used for the generation of acoustic hooks from Janus cylinders.
Sergio Castiñeira-Ibañez +3 more
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, 2006 We predict theoretically the nondiffractive propagation of sonic waves in periodic acoustic media (sonic crystals), by expansion into a set of plane waves (Bloch mode expansion), and by finite difference time domain calculations of finite beams. We also give analytical evaluations of the parameters for nondiffractive propagation, as well as the minimum
Perez-Arjona, Isabel +4 more
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