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Measurement and prediction of voice support and room gain in school classrooms

Pelegrin-Garcia, David; Brunskog, Jonas; Lyberg-Åhlander, Viveka and Löfqvist, Anders LU (2012) In Journal of the Acoustical Society of America 131(1). p.194-204
Abstract
Objective acoustic parameters have been measured in 30 school classrooms. These parameters include usual descriptors of the acoustic quality from the listeners’ standpoint, such as reverberation time, speech transmission index, and background noise level, and two descriptors of the acoustic properties for a speaker: Voice support and room gain. This paper describes the measurement method for these two parameters and presents a prediction model for voice support and room gain derived from the diffuse field theory. The voice support for medium-sized classrooms with volumes between 100 and 250 m3 and good acoustical quality lies in the range between _14 and _9 dB, whereas the room gain is in the range between 0.2 and 0.5 dB. The prediction... (More)
Objective acoustic parameters have been measured in 30 school classrooms. These parameters include usual descriptors of the acoustic quality from the listeners’ standpoint, such as reverberation time, speech transmission index, and background noise level, and two descriptors of the acoustic properties for a speaker: Voice support and room gain. This paper describes the measurement method for these two parameters and presents a prediction model for voice support and room gain derived from the diffuse field theory. The voice support for medium-sized classrooms with volumes between 100 and 250 m3 and good acoustical quality lies in the range between _14 and _9 dB, whereas the room gain is in the range between 0.2 and 0.5 dB. The prediction model for voice support describes the measurements in the classrooms with a coefficient of determination of 0.84 and a standard deviation of 1.2 dB. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Journal of the Acoustical Society of America
volume
131
issue
1
pages
194 - 204
publisher
American Institute of Physics
external identifiers
  • wos:000299130700032
  • scopus:84855948515
ISSN
1520-8524
DOI
10.1121/1.3665987
language
English
LU publication?
yes
id
1c178c8f-d0ac-4028-9e7e-40eca104d0a6 (old id 2372433)
alternative location
http://asadl.org/jasa/resource/1/jasman/v131/i1/p194_s1
date added to LUP
2012-06-27 14:25:34
date last changed
2017-09-03 04:15:42
@article{1c178c8f-d0ac-4028-9e7e-40eca104d0a6,
  abstract     = {Objective acoustic parameters have been measured in 30 school classrooms. These parameters include usual descriptors of the acoustic quality from the listeners’ standpoint, such as reverberation time, speech transmission index, and background noise level, and two descriptors of the acoustic properties for a speaker: Voice support and room gain. This paper describes the measurement method for these two parameters and presents a prediction model for voice support and room gain derived from the diffuse field theory. The voice support for medium-sized classrooms with volumes between 100 and 250 m3 and good acoustical quality lies in the range between _14 and _9 dB, whereas the room gain is in the range between 0.2 and 0.5 dB. The prediction model for voice support describes the measurements in the classrooms with a coefficient of determination of 0.84 and a standard deviation of 1.2 dB.},
  author       = {Pelegrin-Garcia, David and Brunskog, Jonas and Lyberg-Åhlander, Viveka and Löfqvist, Anders},
  issn         = {1520-8524},
  language     = {eng},
  number       = {1},
  pages        = {194--204},
  publisher    = {American Institute of Physics},
  series       = {Journal of the Acoustical Society of America},
  title        = {Measurement and prediction of voice support and room gain in school classrooms},
  url          = {http://dx.doi.org/10.1121/1.3665987},
  volume       = {131},
  year         = {2012},
}