Results 61 to 70 of about 194,541 (227)
Sound absorption coefficient of wet gap graded asphalt mixtures [PDF]
, 2010 Acoustic absorption properties of materials have often been used to reduce the generation and propagation of sound. The research carried out in this paper deals with sound absorption in relation to road surface layers.
Freitas, Elisabete F. +3 more
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Sound Absorption Coefficient in Natural Flax Fibers
, 2020 There are two methods of measuring the amounts of sound absorbed by various materials. One is the reverberation method, in which a specimen of the material to be tested is mounted on the walls of a reverberation chamber and the coefficient of absorption ...
Pont Gregori, Javier
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Análise teórica e experimental do processo de medição in situ da impedância acústica [PDF]
, 2012 Tese (doutorado) - Universidade Federal de Santa Catarina, Centro Tecnológico, Programa de Pós-Graduação em Engenharia Mecânica, Florianópolis, 2011A medição in situ da impedância acústica possui uma série de vantagens em relação à medição da impedância ...
Carneiro, Eric Brandão
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Nihon Kikai Gakkai ronbunshu, 2016 In this paper, we report the use of sound-absorbing materials, specifically sound-absorbing structures of bundled rice straws, that are oblique arranged incident to the sound waves.
Shuichi SAKAMOTO +3 more
doaj +1 more source
Evaluation of acoustic properties of lattice structure manufactured by selective laser melting
Nihon Kikai Gakkai ronbunshu, 2020 In this paper, sound absorption properties of poroelastic lattice structure are investigated through numerical simulation and measurement. The lattice structures discussed in this paper are composed of slender beams only (BCC) and beams and shells (BCC-S)
Naoki MASUDA +3 more
doaj +1 more source
CHARACTERIZATION OF NATURAL FIBERS FOR SOUND ABSORPTION
, 2015 Green materials, either natural or from recycled materials, are becoming a valid alternative to traditional synthetic materials for sound absorption treatments.
Berardi, Umberto, IANNACE, Gino
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, 2011 The composite acoustics board with pore-tank structure and variable cross section structure are made of Medium Density Fiberboard(MDF) as base material, Mytilaria laosensis sheet as veneer board, and sound absorption mat as the substructure material with
Chu Wang Su +3 more
core +1 more source
Specific Normal Impedance and Sound Absorption Coefficients of Materials [PDF]
The Journal of the Acoustical Society of America, 1941 This paper reports the results of comparison measurements of “reverberation coefficients” made on identical samples of materials in three reverberation chambers, having volumes ranging from 10,000 to 15,000 cubic feet. The results of these measurements indicate that, in rooms of comparable size, discrepancies in the measured values of the ...
openaire +1 more source
The use of calabashes as sound absorption alternative material
, 2016 This paper aims to give some scientific information on calabashes used as sound absorption alternative material. For two decades the need for concert halls with adequate acoustic quality has been increasing in Brazil.
Picada, Getúlio +4 more
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Coefficient sound absorption of recycled tires for recording studios [PDF]
, 2016 En el presente trabajo se encuentra consignado el estudio realizado a la llanta, estudio que pretende analizar el comportamiento de la llanta frente al sonido, específicamente la capacidad de absorción y reflexión de sonido llamado “coeficiente de ...
Gomez Meza, Edwin Alberto
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