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An acoustical technique for determining the loss factor of solid materials

Ouis, Djamel LU (2002) In Journal of Testing and Evaluation 30(6). p.497-500
Abstract
A technique is presented here for evaluating the loss factor of a solid material element. This technique is commonly used in room acoustics to evaluate the reverberation time (RT) of rooms, and is therefore reviewed in this paper for applications in solid materials. The reverberation time is a quantity that describes the rate of decay of the sound level in the room, and is inversely proportional to the amount of sound absorption in the room. The loss factor is a measure of the proportion of vibrational energy that is dissipated during one cycle of vibration. Hence, interest is focused in this study on the damping characteristics of the material in terms of the loss factor, which is inversely proportional to RT. The reverberation time may... (More)
A technique is presented here for evaluating the loss factor of a solid material element. This technique is commonly used in room acoustics to evaluate the reverberation time (RT) of rooms, and is therefore reviewed in this paper for applications in solid materials. The reverberation time is a quantity that describes the rate of decay of the sound level in the room, and is inversely proportional to the amount of sound absorption in the room. The loss factor is a measure of the proportion of vibrational energy that is dissipated during one cycle of vibration. Hence, interest is focused in this study on the damping characteristics of the material in terms of the loss factor, which is inversely proportional to RT. The reverberation time may be assessed relatively easily and rapidly from the impulse response of the test specimen as measured with the help of a smart technique. The example of a wood beam-like specimen with artificial defects in the form of voids is presented. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
loss factor, reverberation time, vibration, acoustics, impulse response, nondestructive testing, dispersion, defects, damping
in
Journal of Testing and Evaluation
volume
30
issue
6
pages
497 - 500
publisher
ASTM International
external identifiers
  • wos:000179736000006
  • scopus:0036866955
ISSN
0090-3973
DOI
10.1520/JTE12338J
language
English
LU publication?
yes
id
92220a24-d78e-42d3-b265-727300a6c25d (old id 321604)
date added to LUP
2007-11-08 09:01:29
date last changed
2017-01-01 07:04:56
@article{92220a24-d78e-42d3-b265-727300a6c25d,
  abstract     = {A technique is presented here for evaluating the loss factor of a solid material element. This technique is commonly used in room acoustics to evaluate the reverberation time (RT) of rooms, and is therefore reviewed in this paper for applications in solid materials. The reverberation time is a quantity that describes the rate of decay of the sound level in the room, and is inversely proportional to the amount of sound absorption in the room. The loss factor is a measure of the proportion of vibrational energy that is dissipated during one cycle of vibration. Hence, interest is focused in this study on the damping characteristics of the material in terms of the loss factor, which is inversely proportional to RT. The reverberation time may be assessed relatively easily and rapidly from the impulse response of the test specimen as measured with the help of a smart technique. The example of a wood beam-like specimen with artificial defects in the form of voids is presented.},
  author       = {Ouis, Djamel},
  issn         = {0090-3973},
  keyword      = {loss factor,reverberation time,vibration,acoustics,impulse response,nondestructive testing,dispersion,defects,damping},
  language     = {eng},
  number       = {6},
  pages        = {497--500},
  publisher    = {ASTM International},
  series       = {Journal of Testing and Evaluation},
  title        = {An acoustical technique for determining the loss factor of solid materials},
  url          = {http://dx.doi.org/10.1520/JTE12338J},
  volume       = {30},
  year         = {2002},
}