Evaluation of acoustical conditions for speech communication in working elementary school classrooms

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DOIResolve DOI: http://doi.org/10.1121/1.2839283
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TypeArticle
Journal titleJournal of the Acoustical Society of America
Volume123
Issue4
Pages20642077; # of pages: 14
Subjectspeech intelligibility, sound insulation rating; Classroom acoustics
AbstractThis paper describes the room acoustics characteristics and noise environment of 27 traditional rectangular classrooms from the 41 measured rooms. The purpose of the work was to better understand how to improve speech communication between teachers and students. The study found that on average the students experienced: teacher speech levels of 60.4 dBA, noise levels of 49.1 dB and a mean speech-to-noise ratio of 11dBA during teaching activities. The mean reverberation time in the occupied classrooms was 0.41 s, which was 10% less than in the unoccupied rooms. The reverberation time measurements were used to determine the average absorption added by each student. Detailed analyses of early and late-arriving speech sounds showed these sound levels could be predicted quite accurately and suggest improved approaches to room acoustics design.
Publication date
LanguageEnglish
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedYes
NRC number50072
19213
NPARC number20377542
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Record identifier36be12ba-17a5-4f5c-a246-136de8dc8040
Record created2012-07-24
Record modified2016-05-09
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