Results 11 to 20 of about 194,541 (227)
Mathematical Model for Estimating the Sound Absorption Coefficient in Grid Network Structures [PDF]
Materials (Basel), 2023 Although grid network structures are often not necessarily intended to absorb sound, the gaps between the rods that make up the grid network are expected to have a sound absorption effect.
Takamasa Satoh +4 more
core +2 more sources
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
doaj +2 more sources
An alternative coefficient for sound absorption [PDF]
, 2013 The acoustic absorption coefficient is a number that indicates which fraction of the incident acoustic power impinging on a surface is being absorbed. The incident acoustic power is obtained by spatial integration of the incident intensity, which is (classically) defined as the time-averaged intensity associated with the incident sound field.
Wijnant, Ysbrand H. +2 more
core +3 more sources
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
doaj +2 more sources
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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The design of an impedance tube and testing of sound absorption coefficient of selected materials
, 2021 The paper describes a design, building and testing a low-cost impedance tube for measuring the acoustic parameters of small testing samples. The measurement of sound absorption coefficient is based on transfer function and the two microphone method in ...
R. Ďuriš, E. Labašová
semanticscholar +1 more source
Nihon Kikai Gakkai ronbunshu, 2021 Quantitative evaluation of uncertainty in acoustic properties is an essential issue to improve product quality. The acoustic properties of porous materials, such as sound absorption coefficient, are affected by variations in microstructure and material ...
Yosuke KOMATSU +5 more
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Sound Absorption and Diffusion by 2D Arrays of Helmholtz Resonators
Applied Sciences, 2020 We report a theoretical and experimental study of an array of Helmholtz resonators optimized to achieve both efficient sound absorption and diffusion. The analysis starts with a simplified 1D model where the plane wave approximation is used to design an ...
Iván Herrero-Durá +5 more
doaj +1 more source
Sound transmission testing of polymer compounds [PDF]
, 2012 This is the post-print version of the final paper published in Polymer Testing. The published article is available from the link below. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and ...
Silver, J +3 more
core +1 more source
Fiber Weight Fraction Effect to Acoustic Properties of RHDPE Cantula Composite
Mekanika, 2017 In this study, composites made from recycled HDPE and Cantula fiber have been done and the absorption coefficient have been measured. Composites rHDPE-Cantula were made using hot press for approximately 60 minutes with 170oC temperature while pressure ...
Muhammad Taufik Burhany Hendrowarsito +2 more
doaj +1 more source