Results 331 to 340 of about 2,706,203 (393)
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Perfect sound absorption of Helmholtz resonators with embedded channels in petal shape
Journal of Applied Physics, 2021The acoustic metamaterial in the form of a petal-shaped channel embedded Helmholtz resonator (P-CEHR) is proposed for perfect sound absorption. According to theoretical predictions, numerical simulations, and experiments, the P-CEHR achieves perfect low ...
Mingyu Duan +4 more
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The Journal of the Acoustical Society of America, 1992
The present invention aims at providing a sound barrier member that will enable a sound barrier to be constructed that provides good prevention of sound transmission as well as prevention of sound reflection while remaining relatively inexpensive to produce, the sound barrier member comprising an enclosure in a generally panel like configuration having
West Philip John, Barden Ronald
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The present invention aims at providing a sound barrier member that will enable a sound barrier to be constructed that provides good prevention of sound transmission as well as prevention of sound reflection while remaining relatively inexpensive to produce, the sound barrier member comprising an enclosure in a generally panel like configuration having
West Philip John, Barden Ronald
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THE ABSORPTION OF SOUND IN SEDIMENTS
GEOPHYSICS, 1957Measurements were made of the attenuation of sound in compacted sediments in water using an ultrasonic wave train at frequencies in the megacycle range. Artificial sediments of glass spheres as well as marine sands have been tested and the variation of absorption with frequency, mean grain size, and concentration are illustrated.
J. Busby, E. G. Richardson
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The absorption of sound in emulsions
Acoustical Physics, 2010The absorption of sound in homogeneous dilute emulsions due to the viscosity of the components of the medium is theoretically investigated. Deformation (capillary) oscillations of the emulsion droplets are taken into account. The viscous wavelength is assumed to be small compared to the droplet size, and the latter is assumed to be small compared to ...
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The Journal of the Acoustical Society of America, 1958
Improved absorption results in hydrogen in the range 1 to 37 Mc/sec atmos are reported and their theoretical implications briefly reviewed.
H. D. Parbrook, W. Tempest
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Improved absorption results in hydrogen in the range 1 to 37 Mc/sec atmos are reported and their theoretical implications briefly reviewed.
H. D. Parbrook, W. Tempest
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The Journal of the Acoustical Society of America, 1967
Measurements were made of the acoustical absorption introduced by various configurations of draperies into a small reverberation room. The results are presented and compared here.
William S. Thayer +2 more
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Measurements were made of the acoustical absorption introduced by various configurations of draperies into a small reverberation room. The results are presented and compared here.
William S. Thayer +2 more
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Journal of Industrial Textiles, 2020
This work aims to investigate the mechanical and sound absorption characteristics of industrial waste tea leaf fiber (WTLF), kenaf and E-glass fiber–reinforced hybrid epoxy composites through experimental studies. The WTLF and kenaf fibers were initially
L. Prabhu +5 more
semanticscholar +1 more source
This work aims to investigate the mechanical and sound absorption characteristics of industrial waste tea leaf fiber (WTLF), kenaf and E-glass fiber–reinforced hybrid epoxy composites through experimental studies. The WTLF and kenaf fibers were initially
L. Prabhu +5 more
semanticscholar +1 more source
Sound Absorption of Hemp Fibers (Cannabis Sativa L.) Based Nonwoven Fabrics and Composites: A Review
Journal of Natural Fibers, 2020Compared to the commonly used synthetic fibrous materials, natural fiber represents an eco-friendly solution in various engineering fields. Noise control is an important application of natural fibers due to the unique acoustic characteristics. Studies on
Jiangbo Liao +2 more
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The Absorption of Sound in Cellular Foams
Noise Control and Acoustics, 2004Porous materials are often used as sound absorbers in a variety of situations including architectural and industrial applications. In many cases it is advantageous for the material to be both lightweight and rigid. Metal foams, originally developed for use in catalytic converters in car exhaust systems, offer an attractive mix of properties being both ...
Dupère, Iain D J +2 more
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