Results 181 to 190 of about 194,541 (227)
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Applied Acoustics, 2023
We propose a novel ultralight multifunctional micro-perforated sandwich structure with N-type hybrid core, which exhibits excellent sound absorption as well as good load-bearing capacity and heat transfer performance.
Yongfeng Jiang +4 more
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We propose a novel ultralight multifunctional micro-perforated sandwich structure with N-type hybrid core, which exhibits excellent sound absorption as well as good load-bearing capacity and heat transfer performance.
Yongfeng Jiang +4 more
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Reverberation Measurements of Sound Absorption Coefficients
The Journal of the Acoustical Society of America, 1934A comparison is made of the results of the measurement of the absorption coefficients of twenty-five commercial materials by the organ pipe and ear method with the results obtained by measuring the rates of decay by electrical means. A consistent variation in these results is shown, which can be explained by assuming a slight departure from linearity ...
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Absorption of sound and kinetic coefficients of elastic bodies
Annals of Physics, 1992zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Garanin, D. A., Lutovinov, V. S.
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Engineering Reports
The interest of this article is to obtain the underwater broadband sound absorption characteristics by filling three layers of bubbles in Polydimethylsiloxane polymer (PDMS).
Nansha Gao, Qiaogao Huang, Guang-xu Pan
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The interest of this article is to obtain the underwater broadband sound absorption characteristics by filling three layers of bubbles in Polydimethylsiloxane polymer (PDMS).
Nansha Gao, Qiaogao Huang, Guang-xu Pan
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Unveiling enhanced sound absorption in coconut wood through hemicellulose and lignin modification.
International Journal of Biological MacromoleculesCoconut wood (Cocos nucifera L.) is lightweight and has variable quality, making it a potential candidate for manufacturing sound absorption boards.
H. Kolya, Chunwon Kang
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Virtual and Physical Prototyping
Currently, the development in shell-based lattice, is increasingly focused on multifunctionality, with growing interest in combining sound and energy absorption. However, few studies have explored the multi-objective inverse design process.
Zongxin Hu +7 more
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Currently, the development in shell-based lattice, is increasingly focused on multifunctionality, with growing interest in combining sound and energy absorption. However, few studies have explored the multi-objective inverse design process.
Zongxin Hu +7 more
semanticscholar +1 more source
The Measurement of Sound Absorption Coefficients by the Reverberation Method
The Journal of the Acoustical Society of America, 1929The paper reports the results of an experimental study of the Reverberation Method. The assumptions made in the Reverberation Theory are critically examined. The fundamental equation at1 = 9.2Vv log10 4Eaı̣v affords two independent means of measuring the change produced in the quantity a for a given room, using a source whose acoustic power may be ...
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Field testing of sound absorption coefficients in a classroom
The Journal of the Acoustical Society of America, 2005Formal procedures for determining the sound absorption coefficients of materials installed in the field do not exist. However, the U.S. Air Force requested such tests to prove that the sound-absorbing material used in classrooms at Beale AFB in Marysville, CA, met the specified NRC of 0.80. They permitted the use of two layers of 0.5-in.
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The Tube Method of Measuring Sound Absorption Coefficients
The Journal of the Acoustical Society of America, 1929The general principles underlying the tube method of measuring sound absorption can be derived conveniently from the analogous equations for the electrical transmission line. These equations show that the actual method of measurement is capable of many modifications, some of which have already been adopted by various experimenters. However, if reliable
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A review on polymer-based materials for underwater sound absorption
Polymer Testing, 2021Yifeng Fu +2 more
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