Optimising sound quality for classrooms

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ConferenceProceedings of XX Meeting of SOBRAC (Brazilian Acoustical Association): 21 October 2002, Rio de Janeiro
Pages115; # of pages: 15
Subjectspeech intelligibility, speech in rooms, classroom acoustics; Classroom acoustics; Speech security
AbstractIt is well known that good acoustical design should optimise room acoustics and minimise unwanted noise so that effective speech-to-noise ratios are maximised in classrooms. However, the common experience of difficult speech communication in many rooms is evidence that many problems remain. A review of the literature shows that reported noise levels in classrooms almost always exceed ideal criteria, but these results may be questioned because it is difficult to measure the speech and noise levels that occur during actual speech. Many criteria are based on studies that show a poor understanding of room acoustics and tend to prescribe more absorptive environments ignoring the positive effects of early reflections. The more stringent requirements for various special needs groups such as younger listeners are much less well defined. We still design rooms in terms of reverberation time that only indirectly relates to critical room acoustics details and even this we cannot do accurately. This paper will review recent studies that have attempted to solve some of these problems and will outline key remaining research needs.
Publication date
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedNo
NRC number45999
NPARC number20378762
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Record identifiercb8703be-2eb7-45d8-a769-84d69261fd3a
Record created2012-07-24
Record modified2016-05-09
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