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Negative birefraction of acoustic waves in a sonic crystal
Nature Materials, 2007Optical birefringence and dichroism are classical and important effects originating from two independent polarizations of optical waves in anisotropic crystals. Furthermore, the distinct dispersion relations of transverse electric and transverse magnetic polarized electromagnetic waves in photonic crystals can lead to birefringence more easily. However,
Ming-Hui, Lu +9 more
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Nondiffractive propagation of sound in sonic crystals
The Journal of the Acoustical Society of America, 2008In this work we present the study of the nondiffractive propagation regime of ultrasonic waves in a two-dimensional periodic acoustic media (sonic crystal) both from the theoretical and the experimental point of view. An analytical treatment of this regime sonic wave propagation is presented, which allows evaluating the parameters of the nondiffractive
Isabel Perez-Arjona +4 more
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Subdiffractive propagation of ultrasound in sonic crystals
Physical Review B, 2007We present an experimental demonstration of the subdiffractive propagation (self-collimation) of an ultrasound beam in a two-dimensional sonic crystal formed by a square array of steel cylinders inmersed in water. Measurements show that the diffractive spreading of a narrow beam is strongly reduced along the spatially modulated direction of the crystal.
Víctor Espinosa +4 more
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Band Structure in a Sustainable Sonic Crystal
Materials Science Forum, 2019During the last few decades many researchers have been interested in acoustic wave propagation in artificial periodic composites known as sonic crystals. Sonic crystals have received renewed attention because they exhibit acoustic band gaps where there are only evanescent waves.
Edson Jansen Pedrosa Miranda Jr. +2 more
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Field Experiment of a Sonic Crystal Window
Fluctuation and Noise Letters, 2018In the present study, white, pink, construction and environmental noises were evaluated in a student hostel at National University of Singapore (NUS) with a newly designed sonic crystal (SC) window using sound quality head and torso simulator. The sound head was placed at the bed and the chair in the student hostel.
Hsiao Mun Lee +4 more
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Resonant elements for sonic crystal barriers.
The Journal of the Acoustical Society of America, 2010Multiple scattering in periodically spaced, vertically orientated cylinder arrays produces band gaps, the (Bragg) frequencies of which are determined by the lattice constants. For rigid cylinders these band gaps tend to have azimuthal angle dependency. Additional relatively angle-independent band gaps at frequencies below the first Bragg frequency can ...
Keith Attenborough +2 more
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Acoustic cavities with radial sonic crystals.
The Journal of the Acoustical Society of America, 2009Radial sonic crystals in two and three dimensions are introduced. These materials have the property of leaving the acoustic wave equation invariant under radial displacements, and then they present a “radial band structure” similar to that of one dimensional sonic crystals. Finite shells of radial sonic crystals can be used as resonant cavities.
Daniel Torrent, José Sánchez-Dehesa
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Journal of Vibration Engineering & Technologies, 2022
Debasish Panda, Amiya Ranjan Mohanty
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Debasish Panda, Amiya Ranjan Mohanty
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ON THE OPTIMIZATION OF SONIC CRYSTAL NOISE BARRIERS
Inter-Noise 2022, 2023D RAMIREZ-SOLANA +4 more
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