Results 31 to 40 of about 194,541 (227)
Sound absorption coefficient of natural fibres hybrid reinforced polyester composites
, 2015 Natural fibres have been known of its good acoustic damping properties and therefore, these materials could be used as a sound insulation in many applications.
A. H. Abdullah, A. Azharia, F. M. Salleh
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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 ...
Aso, Sadao, Kinoshita, Rikuhiro
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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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Sound Absorption Coefficient and Sound Transmission Loss of Rice Hull Mat
Journal of the Korean Wood Science and Technology, 2019 1) The sound absorption coefficient and transmission loss of several types of rice hull mats with varying apparent densities and thicknesses are estimated in this paper using the transfer function and matrix methods, respectively, to evaluate the ...
C. Kang +3 more
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Journal of Low Frequency Noise Vibration and Active Control, 2023 Acoustic metamaterials with both ventilation and broadband asymmetric absorption have demonstrated great scientific significance and promising applicability.
Deshi Meng, Lijun Li, Zhenhua Wu
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Influence of the Grain Orientation of Wood upon Its Sound Absorption Properties
Materials, 2023 The purpose of the study was to analyze the influence of the quality class and the orthotropy of wood upon the sound absorption coefficient, the reflection and the impedance ratio of two species widely used for stringed musical instruments, namely spruce
M. Guiman +5 more
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Zhongguo Jianchuan Yanjiu, 2023 ObjectiveThis paper aims to study the characteristics and calculation method of the vibration and sound radiation of single ring-stiffened cylindrical shells with porous fiber composite materials installed in the inner wall under acoustic excitation ...
Xinmei YANG +3 more
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Velocity and Absorption Coefficient of Sound Waves in Classical Gases
Ukrainian Journal of Physics, 2020 The velocity and absorption coefficient of plane sound waves in classical gases are obtained by solving the Boltzmann kinetic equation. This is done within the linear response theory as a reaction of the single-particle distribution function to a periodic external field.
Magner, A. G. +2 more
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Journal of the Korean Wood Science and Technology, 2018 1) This study estimates the sound absorption capability of rice straw particle mats by two methods: the transfer function method and the reverberation room method. In the reverberation method, the central frequency was set to the one-third octave band in
C. Kang, E. Jang, S. Jang, Ho-Yang Kang
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