Results 21 to 30 of about 13,594 (294)
Method for Calculating the Sound Absorption Coefficient for a Variable Range of Incidence Angles
Archives of Acoustics, 2020 The theoretical estimation of sound absorption coefficient of a surface may give very different results. This will depend on the type of sound field assumed in the theoretical model used for the estimation of its sound absorption coefficient.
Sergio Alfio YORI
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Potensi Sekam Padi dan Jerami sebagai Alternatif Material Akustik
Physics Education Research Journal, 2020 Technology that is increasingly developing produces equipments in the form of information, communication, production, transportation and entertainment facilities. Most of the equipments produce noises. Noise can be reduced by using acoustic dampers. This
Ahmad Minanur Rohim +2 more
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Investigation of sound absorption capability of pine (Pinus densiflora) cone particles
Journal of Wood Science, 2023 In this study, the sound absorption capability of pine (Pinus densiflora) cone particles was investigated as an alternative and eco-friendly, sound-absorbing material.
Eun-Suk Jang, Chun-Won Kang
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Effect of non-acoustic properties on the sound absorption of polyurethane foams [PDF]
Journal of Theoretical and Applied Vibration and Acoustics, 2015 In this paper the influence of non-acoustic properties on the sound absorption coefficient of polyurethane foams as a porous medium is investigated. Biot’s equations with transfer matrix method, as the solution approach are employed to evaluate the sound
Mostafa Asadi +2 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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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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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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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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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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