Optimizing classroom acoustics using computer model studies

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Journal titleCanadian Acoustics/Acoustique Canadienne
IssueDecember 4
Pages1521; # of pages: 7
SubjectClassroom acoustics
AbstractSpeech intelligibility in rooms is determined by both room acoustics characteristics as well as speech-to-noiseratios. These two types of effects are combined in measures such as useful-to-detrimental sound ratios whichare directly related to speech intelligibility. This paper reports investigations of optimum acoustical conditionsfor classrooms using the ODEON room acoustics computer model. By determining conditions that relate tomaximum useful-to-detrimental sound ratios, optimum conditions for speech are determined. The results showthat an optimum mid-frequency reverberation time for a classroom is approximately 0.5 s, but speechintelligibility is not very sensitive to small deviations from this optimum. Speech intelligibility is influencedmore strongly by ambient noise levels. The optimum location of sound absorbing material was found to be onthe upper parts of the walls.
Publication date
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedYes
NRC number42045
NPARC number20331321
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Record identifierdff24faf-f87b-47ec-9012-d79b3b9efb2f
Record created2012-07-18
Record modified2016-05-09
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