Abstract
In this article, objective acoustic parameters and students’ subjective responses were compared before and after an acoustic treatment in an elementary-school classroom. Acoustic treatment was done by installing sound absorptionmaterials on the ceiling of the classroom for control of sound reverberation. The effects of reverberation time on children’s speech recognition have also been investigated. Results show that (1) the objective acoustic parameters in the classroom were obviously improved; (2) the subjective loudness of different types of noise sources, that students experienced in the classroom, were reduced; and (3) the speechintelligibility was significantly improved in the classroom after the acoustic treatment.
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