Results 101 to 110 of about 2,768,062 (267)
Sound absorption performance of helically perforated porous metamaterials at high temperature
Materials & Design, 2023 A high-temperature theoretical model is established to investigate the sound absorption performance of helically perforated porous metamaterials (HPPM) at high temperature. Finite element simulations are carried out to validate the theoretical model, and
Weitao Zhang, Xuewei Liu, Fengxian Xin
doaj
SOUND VELOCITY AND SOUND ABSORPTION IN THE CRITICAL TEMPERATURE REGION [PDF]
, 1951 W. G. Schneider
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Reviewed here is the current state of knowledge with respect to each basic mechanism of sound propagation in the atmosphere and how each mechanism changes the spectral or temporal characteristics of the sound received at a distance from the source.
Daigle, Gilles A., Embleton, Tony F. W.
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In situ sound absorption estimation with the discrete complex image source method [PDF]
arXivEstimating the sound absorption in situ relies on accurately describing the measured sound field. Evidence suggests that modeling the reflection of impinging spherical waves is important, especially for compact measurement systems. This article proposes a method for estimating the sound absorption coefficient of a material sample by mapping the sound ...
arxiv
Velocity and absorption coefficient of sound waves in classical gases [PDF]
arXiv, 2018 Velocity and absorption coefficient of the plane sound waves in classical gases are obtained by solving the Boltzmann kinetic equation. This is done within the linear response theory as a reaction of the single-particle distribution function to a periodic external field.
arxiv
The Theory of Sound Absorptive Materials [PDF]
, 1952 Cyril M. Harris, C. T. Molloy
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Ultrasonic propagation in gases at high temperatures [PDF]
, 1970 Ultrasonic pulse method /1 to 3 MHz/ measures both sound speed and absorption in monatomic and polyatomic gases in a temperature range of 300 to 20000 degrees K at atmospheric pressure.
Carey, C. +3 more
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The Absorption of Sound in Mixtures of Gases which Exhibit a Vibrational Relaxation Time [PDF]
, 1953 F. A. Angona
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Effects of fiber motion on the acoustic behavior of an anisotropic, flexible fibrous material [PDF]
The acoustic behavior of a flexible fibrous material was studied experimentally. The material consisted of cylindrically shaped fibers arranged in a batting with the fibers primarily aligned parallel to the face of the batting.
Dahl, Milo D. +2 more
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BioResourcesThe use of perforated plywood as an interior architectural sound-absorbing material has been increasing in popularity in Korea. This study investigated the sound absorption performance of marketed birch (Betula platyphylla) plywood with circular and ...
Eun-Suk Jang +3 more
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