Results 21 to 30 of about 5,453 (264)
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 Measurements on a Sonic Crystals Barrier
Energy Procedia, 2015 AbstractThis paper describes the measurements carried out over a sonic crystal at normal incidence according to EN 1793-6, which allows to cancel ground reflection and edge diffraction by applying suitable windowing techniques. The sample was made of hollow PVC pipes with an outer diameter of 160mm arranged in a square lattice with lattice constant 0.2
MORANDI, FEDERICA +4 more
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Journal of Glaciology, 2017 We describe methods for measuring crystal orientation fabric with sonic waves in an ice core borehole, with special attention paid to vertical-girdle fabrics that are prevalent at the WAIS Divide.
DAN KLUSKIEWICZ +5 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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Spatial filtering of sound beams by sonic crystals [PDF]
Applied Acoustics, 2012 We propose and numerically demonstrate an efficient cleaning of spatial structure (spatial filtering) of sound beams by propagating them through at least twodimensional sonic crystals, i.e. through acoustic structures periodically modulated in longitudinal and in transversal direction with respect to the sound propagation direction. We show the spatial
Picó Vila, Rubén +3 more
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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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Energy harvesting from sonic noises by phononic crystal fibers
Scientific Reports, 2022 In this investigation, a phononic crystal-based fiber is proposed for energy harvesting application in metalworking factories. Phononic crystal plays the role of cladding in elastic fiber structure.
Farzaneh Motaei, Ali Bahrami
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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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Improving Sound Transmission Through Triple-Panel Structure Using Porous Material and Sonic Crystal
Archives of Acoustics, 2019 Main aim of this study is to combine the characteristics of the sonic crystal (SC) with acoustic panels and porous materials to improve the sound transmission loss (STL) through the triple-panel structure.
Myong Jin KIM
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Sensors, 2019 In this work, we present an integrated photogrammetric-acoustic technique that, together with the construction of a scaled wind tunnel, allows us to experimentally analyze the permeability behavior of a new type of acoustic screen based on a material ...
José M. Bravo +4 more
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