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Sound Absorption Coefficient of Glass Wool
Journal of the Textile Machinery Society of Japan - Transactions -, 1965 This article presents the results of an investigation into the relation between the normal incident sound absorption coefficient and the apparent density of glass wool boards used as a sound absorbent.(1) Only one kind of glass wool boards 64kg/m3 in apparent density and 2.5cm in thickness out of 20 kinds made by 3 manufacturers has given a sound ...
Sadao Aso, Rikuhiro Kinoshita
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بهداشت و ایمنی کار, 2021 Introduction: In recent years tend to use of natural fibers has increased in making sound absorbers. Fiber-based natural materials have low density, low production costs, and are biodegradable.
Reza Jafari Nodoushan +3 more
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Identification Of Press Brick Composition As A Sound Absorbers
Buletin Fisika, 2018 – Sound absorption research using the press brick made of cement and sand has been done. The research was conducted to determine the effect of mixture on the absorption coefficient value of sound of the brick.
Ni Made Wedayani +2 more
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The directivity of the sound radiation from panels and openings [PDF]
, 2009 This paper presents a method for calculating the directivity of the radiation of sound from a panel or opening, whose vibration is forced by the incidence of sound from the other side.
Davy, J
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Measuring sound absorption: considerations on the measurement of the active acoustic power [PDF]
, 2014 Using a local plane wave assumption, one can determine the normal incidence sound absorption coefficient of a surface by measuring the acoustic pressure and the particle velocity normal to that surface.
Boer, A. de +2 more
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Theoretical assessment of sound absorption coefficient for anisotropic nonwovens [PDF]
QScience Connect, 2012 The anisotropy factor as a function of fiber arrangement, fiber fineness and sample thickness has been derived from the theories of soundwave transformation due to phase changing.
Klara Kalinova
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Nonlinear acousto-electric transport in a two-dimensional electron system
, 2000 We study both theoretically and experimentally the nonlinear interaction between an intense surface acoustic wave and a two-dimensional electron plasma in semiconductor-piezocrystal hybrid structures.
A. L. Belostotskii +43 more
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Sound absorption property of openpore aluminum foams [PDF]
China Foundry, 2007 This paper presents a study on sound absorption property of aluminum foam by evaluating its sound absorption coefficients using standing wave tube method. Experimental results showed that the average values of sound absorption coefficients (over the test
WANG Fang, WANG Lu-cai, WU Jian-guo
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Development of sound absorption coefficient prediction technique of ultrafine fiber
Nihon Kikai Gakkai ronbunshu, 2016 This report deals with sound absorption coefficient prediction technique of ultrafine fiber. As the sound absorption material used for the interior noise reduction of the automobile, the fiber with a diameter of several μm is considered.
Yoshio KUROSAWA
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Predicted sound absorption coefficients of absorber materials lined in a chamber
International Journal of Environmental Health Engineering, 2014 Aims: The present study was aimed to measurement of sound absorption coefficient of mineral wool and determination of their absorption ability. Materials and Methods: Mineral wool was used to find noise absorption coefficient.
Farhad Forouharmajd +3 more
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