Classroom acoustics for acceptable speech recognition: A review

J.S. Bradley


The basic acoustical requirements for accpetable speech recognition in classrooms were investigated. The scores for speech intelligibility increased with increasing signal-to-noise ratio until near 100% intelligibility was reached. The study was useful in determining safe teacher voice levels and the required speech/noise ratio for all ages of children.


Acoustic noise; Signal to noise ratio; Speech intelligibility; Speech recognition; Speech levels

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