Results 11 to 20 of about 400,889 (304)
An investigation into sound transmission loss by polypropylene needle-punched nonwovens
Alexandria Engineering Journal, 2016 In this work, the effects of variables such as initial carded web mass, needle penetration depth, punch density, and the frequency of incident sound wave on transmission of sound through polypropylene needle-punched nonwovens were investigated.
Kazem Ghorbani +3 more
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Effect of sound-absorptive facings on partition airborne-sound transmission loss [PDF]
The Journal of the Acoustical Society of America, 1977 Laboratory measurements of the improvement of partition airborne-sound transmission loss in the presence of sound-absorptive partition facings are presented. For a double-leaf partition of 1/2-in.-thick gypsum board on 2×4-in. studs, the application of such facings has led to improvements in transmission loss in excess of 10 dB in the 1/3-octave bands ...
Steven M. Brown +2 more
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Noise prediction considering transmitted sound from noise barriers
Nihon Kikai Gakkai ronbunshu, 2019 In the noise prediction on railway viaducts by numerical acoustic analysis, it is premised that the noise barriers have sufficient sound insulation performance.
Daigo SATO, Akira OMOTO
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Analytical Expression for Sound Transmission Loss Calculation: An Improvement to the Existing Method after Singh and Katra [PDF]
, 2009 An analytical expression for measuring of sound transmission loss (TL) has been developed by using two microphones, an impedance tube and an impulse sound source as a proposed improvement to the existing procedure after Singh and Katra (1978).
Yahya, Iwan
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Experimental Investigation of Sound Transmission Loss in Double-Glazing Filled with Hydrogel
Muhandisī-i bihdāsht-i ḥirfah/ī, 2022 Background and Objective: Double-glazing is one of the methods of sound control. The use of materials other than gas inside double-glazing can develop sound transmission loss.
Iraj Ali Mohammadi +4 more
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Archives of Acoustics, 2015 The paper presents application of Taguchi method in optimizing the sound transmission loss through sandwich gypsum constructions and those comprising of masonry concrete blocks and gypsum boards in order to investigate the relative influence of the ...
Naveen GARG, Anil KUMAR, Sagar MAJI
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Quantum sticking, scattering and transmission of 4He atoms from superfluid 4He surfaces [PDF]
, 1998 We develop a microscopic theory of the scattering, transmission, and sticking of 4He atoms impinging on a superfluid 4He slab at near normal incidence, and inelastic neutron scattering from the slab.
A. F. G. Wyatt +25 more
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Sound transmission loss of windows [PDF]
The Journal of the Acoustical Society of America, 1979 An extensive series of measurements has been made to obtain a systematic evaluation of the effects of glass thickness and interpane spacing on the sound transmission loss of windows. These included 93 laboratory measurements conforming to ASTM standard E90 and field measurements on a subset of 18 of these window types.
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Sound transmission loss single number ratings [PDF]
The Journal of the Acoustical Society of America, 1987 Several single number ratings, including STC, for rating the sound insulation properties of walls were correlated with the A-weighted sound reductions of a group of gypsum board partitions for several types of sound source. None of the ratings fared well for the broad range of sound types.
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A new method to compute sound transmission loss by acoustic FEM
Nihon Kikai Gakkai ronbunshu, 2014 In this paper, a new method to evaluate performance of sound insulating plates in closed medium is investigated by using acoustic finite element method (FEM) under such two conditions that plates are having free ends and that plates are simply supported.
Sachiko ISHIDA +3 more
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