Initial Study on the Reverberation Time Standard for the Korean Middle and High School Classrooms Using Speech Intelligibility Tests

The most important function of the classroom is to transmit educational information from teachers students more accurately and clearly. acoustical environment thus has an effect on improvement students’ learning ability. To provide appropriate for students, it necessary create performance standard classrooms a guideline designing classrooms. However, in Korea, there not classrooms; thus, difficult control manage when building present study aims suggest acoustic standards that are suitable Korean language. In order perform this study, were created by standardizing architectural dimensions 17 middle high school Cheong-ju. Speech intelligibility tests conducted using three different languages including Korean, English, Chinese. Twenty native speakers each language used as subjects speech tests. Finally, auralized sound sources with five conditions reverberation time (0.47~1.22 s) changing indoor absorption real classroom. Listening undertaken 52 adults normal hearing, source. results proved was above 0.76 s. Based research findings, ideal Korea follows: background noise below 35 dBA, 0.80 It also should be 20% without side walls satisfy standard.