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A numerical study of a method for measuring the effective in situ sound absorption coefficient [PDF]
, 2012 The accuracy of a method [Wijnant et al., “Development and applica- tion of a new method for the in-situ measurement of sound absorption”, ISMA 31, Leuven, Belgium (2010).], for measurement of the effective area-averaged in situ sound absorption ...
André de Boer +4 more
core +3 more sources
The Absorption of Sound in Gases [PDF]
Science, 1935 Several investigators have shown recently that if the changes in the internal energy of a gas take place so slowly that they cannot follow the adiabatic changes which result when a sound wave passes through the gas, sound dispersion and anomalous absorption of observable magnitudes occur.
openaire +4 more sources
Study of the Sound Absorption Performance of Ethylene-Vinyl Acetate Foam Materials
Medžiagotyra, 2019 Ethylene-Vinyl Acetate (EVA) polymer foam was prepared using a mold for this investigation. The effect of the cell structure parameters and pore filling gas type on the sound absorption performance of the EVA foam materials were analyzed in terms of ...
Wei GONG +5 more
doaj +1 more source
Journal of the Korean Wood Science and Technology, 2022 In this study, I used wood pellets as an eco-friendly sound-absorbing material. The aim of the research was to analyze the effect of the filling height of wood pellets on sound absorption.
E. Jang
semanticscholar +1 more source
A hybrid acoustic structure for low-frequency and broadband underwater sound absorption
Journal of Low Frequency Noise Vibration and Active Control, 2022 The underwater anechoic coating with local resonant units is an effective method to achieve low-frequency sound absorption. However, the structure obtained in this way is not satisfactory in the sound absorption effect of mid-high frequency bands ...
Xinyu Jia +4 more
semanticscholar +1 more source
Sound absorption by clamped poroelastic plates [PDF]
, 2008 Measurements and predictions have been made of the absorption coefficient and the surface acoustic impedance of poroelastic plates clamped in a large impedance tube and separated from the rigid termination by an air gap.
Attenborough K. +4 more
core +1 more source
Atmospheric Absorption of Sound [PDF]
The Journal of the Acoustical Society of America, 1972 By assuming air is composed of four gases, i.e., nitrogen, oxygen, water vapor, and carbon dioxide, and applying energy transfer rates for the binary collisions inherent in such a system, absorption of sound in the atmosphere has been predicted. The calculated curves based upon 24 energy transfer mechanisms are compared with experimental data over the ...
Louis C. Sutherland +2 more
openaire +2 more sources
e-Polymers, 2020 Porous material (PM) shows good sound absorption performance, however, the sound absorbing property of PM with different parameters are greatly different.
Wang Yonghua +5 more
doaj +1 more source
Absorption of Sound by a Strip of Absorptive Material in a Diffuse Sound Field
The Journal of the Acoustical Society of America, 1959 The random incidence sound absorption coefficient is calculated for a narrow strip of absorbing material set in an otherwise reflecting plane. The assumptions made are that the material is of the locally reacting type, with a real normal admittance. The effect of an imaginary component of admittance is discussed qualitatively.
Northwood, T. D. +2 more
openaire +4 more sources
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