Results 31 to 40 of about 2,715,434 (394)
Development of biodegradable composite micro-perforated panel made from natural fibre composites with evaluation of its acoustic and mechanical properties [PDF]
, 2020 Micro-perforated panel (MPP) has been widely considered as a promising alternative for sound absorption purposes. Plenty of research has been done to improve the sound absorption of MPP but no specific work highlights the material structure effect ...
Chin, Desmond Daniel Vui Sheng
core
Structural Characteristics and Sound Absorption Properties of Waste Hemp Fiber
Coatings, 2022 In order to realize high-efficiency and high-value recycling of waste hemp fibers, the macromolecular structure, the supramolecular structure, and the morphological structure of waste hemp fibers were investigated by using Fourier transform infrared ...
Duoduo Zhang +3 more
semanticscholar +1 more source
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
doaj
Journal of Low Frequency Noise, Vibration and Active Control, 2022 Since the development of advanced sound absorption material is highly critical in noise control applications, anechoic coatings, and acoustic metamaterials, both fabrication technology and structure design are significant in the achievement of broadband ...
Longgui Peng +4 more
doaj +1 more source
Nonlocal acoustic metasurface for ultrabroadband sound absorption
Physical review B, 2021 Classical meta-absorber designs usually have a tradeoff between bandwidth, efficiency, and thickness. Here, we introduce the concept of a nonlocal acoustic metasurface absorber by using a bridge structure connecting resonating unit cells to improve the ...
Yifan Zhu +5 more
semanticscholar +1 more source
Sound Absorption of Curtains [PDF]
The Journal of the Acoustical Society of America, 1970 The absorption of normal incident sound by a curtain hung flat before a wall depends on the flow resistivity and the weight of the material and the distance to the wall, as has been found experimentally and could be deduced theoretically. The same theory allows one to calculate the absorption for oblique incident and, also therefore, for statistical ...
openaire +2 more sources
Sound Absorption by Acoustic Microlattice with Optimized Pore Configuration
, 2017 Sound absorption or dissipation principally involves joint interactions between sound waves, material morphology and the air medium. How these elements work most efficiently for sound absorption remains elusive to date.
Cai, Xiaobing +3 more
core +1 more source
Sound Absorption Properties of Natural Fibers: A Review
Sustainability, 2020 In recent years, in an attempt to substitute the conventional synthetic sound absorption material, natural fibers and their sound absorption properties have been increasingly studied.
Tao Yang +6 more
semanticscholar +1 more source
Sound Absorption of Snow [PDF]
Nature, 1939 THE impressive and all-pervading quietness following a fall of snow is a commonplace experience, though, so far as we are aware, no measurements of the sound absorption of snow have been published. The recent cold spell provided a suitable opportunity to make such measurements in the reverberation chamber of the National Physical Laboratory.
G. W. C. Kaye, E. J. Evans
openaire +4 more sources
Sound attenuation in the superconducting amorphous alloy ZrTiCuNiBe [PDF]
, 1999 The superconducting energy gap and the parameter of the intensity of electron scattering at two-level systems in amorphous ZrTiCuNiBe are determined from the results of measurements of sound attenuation.
A. L. Gaiduk +8 more
core +2 more sources