Results 11 to 20 of about 118,824 (293)
Results in EngineeringThis study proposes an underwater coating with sound absorption ability in the middle-to-low frequency range and establishes an acoustic theoretical model combining the equivalent medium theory and the transfer matrix method.
Nansha Gao +3 more
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ENHANCEMENT OF COIR FIBER NORMAL INCIDENCE SOUND ABSORPTION COEFFICIENT [PDF]
Journal of Computational Acoustics, 2012 Coir fiber from coconut husk is an important agricultural waste in Malaysia. The porous structure of fiber makes it an eligible material for acoustical absorption. In previous studies at Universiti Kebangsaan Malaysia, single layer coir fiber showed low acoustical absorption in medium and low frequencies; e.g.
Fouladi, M. +3 more
openaire +2 more sources
Journal of Wood Science, 2021 We investigated the effect of ultrasonic treatment on Malas (Homalium foetidum) gas permeability and sound absorption coefficient using the transfer function method.
Chun-Won Kang +4 more
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The effect of moisture content on sound absorption of expanded perlite plates [PDF]
, 2005 Cataloged from PDF version of article.Expanded perlite is a porous, lightweight, fire resistant and moisture retaining material with sound and thermal insulation properties.
Ozdeniz, M. B., Yilmazer, S.
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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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Acoustic properties of biodegradable composite micro-perforated panel (BC-MPP) made from kenaf fibre and polylactic acid (PLA) [PDF]
, 2018 This paper investigates the sound absorption of biodegradable composite micro-perforated panel (BC-MPP) made from kenaf fibre and biodegradable polymer known as polylactic acid (PLA). BC-MPP samples were made through conventional machining method such as
Che Din, Nazli +3 more
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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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Predicting the absorption of perforated panels backed by resistive textiles [PDF]
, 2016 This paper studies the diffuse field sound absorption coefficient of a system consisting of a rigid perforated panel with a thin porous woven/matted material glued to its back, which is placed in front of an air cavity with a rigid backing.
Davy, J, Larner, D
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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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