Results 151 to 160 of about 2,739,672 (219)
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Enhancing of broadband sound absorption through soft matter.
Materials Horizons, 2021This paper proposed a metamaterial design method that uses soft matter for constructing a unique soft acoustic boundary to effectively improve broadband sound absorption performance.
Fuyin Ma +4 more
semanticscholar +1 more source
The Journal of the Acoustical Society of America, 1986
Two pelts of fiberglass are bonded together to form a sound absorption panel. One pelt is deformed to a sawtooth shape and the teeth of the sawtooth pelts are bonded into grooves in the other pelt which is essentially flat except for the grooves.
Wilbur D. Holben, Jerry M. Wolf
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Two pelts of fiberglass are bonded together to form a sound absorption panel. One pelt is deformed to a sawtooth shape and the teeth of the sawtooth pelts are bonded into grooves in the other pelt which is essentially flat except for the grooves.
Wilbur D. Holben, Jerry M. Wolf
openaire +2 more sources
Labyrinthine acoustic metastructures enabling broadband sound absorption and ventilation
, 2020There is growing interest in the development of path coiling-based labyrinthine acoustic metamaterials for realizing extraordinary acoustical properties such as low-to-mid frequency sound absorption.
Sanjay Kumar, H. Lee
semanticscholar +1 more source
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
semanticscholar +1 more source
Applied Physics Letters, 2020
Acoustic impedance regulation of a neck embedded Helmholtz resonator is realized by introducing surface roughness to the neck so as to convert the initially non-perfect sound absorber to a perfect sound absorber.
Mingyu Duan +4 more
semanticscholar +1 more source
Acoustic impedance regulation of a neck embedded Helmholtz resonator is realized by introducing surface roughness to the neck so as to convert the initially non-perfect sound absorber to a perfect sound absorber.
Mingyu Duan +4 more
semanticscholar +1 more source
Mechanical and Sound Absorption Behavior of Sisal and Palm Fiber Reinforced Hybrid Composites
Journal of Natural Fibers, 2021The present work explores the tensile, flexural, impact strengths and sound absorption behavior of sisal and palm fiber-reinforced hybrid composites. The sisal and palm fibers were reinforced with epoxy resin through a compression molding technique to ...
N. Dhandapani, A. Megalingam
semanticscholar +1 more source
The Absorption of Sound in Air
The Journal of the Acoustical Society of America, 1953A detailed review will be presented, summarizing available data on absorption of sound in homogeneous air and its main constituents as a function of frequency, pressure, temperature, and humidity. Disagreement exists between results of the various investigators, especially when different techniques are used.
W. L. Nyborg, J. F. S. Y. Lee
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Absorption of Sound in Insulators
Physical Review, 1961The theory of sound attenuation in structurally perfect dielectric crystals is extended and applied to recent experiments on the absorption of acoustic waves in crystalline quartz at frequencies from ${10}^{9}$ cps to 2.4\ifmmode\times\else\texttimes\fi{}${10}^{10}$ cps.
H. Ehrenreich, Truman O. Woodruff
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Inverse design of structured materials for broadband sound absorption
Journal of Physics D: Applied Physics, 2021This paper discusses the design of structured materials for broadband waterborne sound absorption. The structured materials are composed of a rubber matrix embedded periodically with cavities.
Yang Wang +5 more
semanticscholar +1 more source
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