Speech intelligibility studies in classrooms

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AuthorSearch for:
Journal titleJournal of the Acoustical Society of America
Pages84654; # of pages: 793
Subjectspeech intelligibility; room acoustics; classrooms; speech intelligibility tests; acoustical measurements; background noise levels; early decay times; reverberation times; octave-band measurements; early/late sound ratios; center time; octave-band useful/detrimental ratios; speech transmission index; ideal design goals for acoustical conditions; Classroom acoustics; Speech security; intelligibilité; acoustique des salles; salles des cours
AbstractSpeech intelligibility tests and acoustical measurements were made in ten occupied classrooms. Octave-band measurements of background noise levels, early decay times, and reverberation times, as well as various early/late sound ratios, and the center time were obtained. Various octave- band useful/detrimental ratios were calculated along with the speech transmission index. The interrelationships of these measures were considered to evaluate which were most appropriate in classrooms, and the best predictors of speech intelligibility scores were identified. From these results ideal design goals for acoustical conditions for classrooms were determined either in terms of the 50-ms useful/ detrimental ratios or from combinations of the reverberation time and background noise level.
Publication date
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedYes
NRC number26640
NPARC number20374201
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Record identifiere6e90cb2-5dee-4324-9295-43309eaec147
Record created2012-07-23
Record modified2016-05-09
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