소음원에 따른 교실내 청취환경 변화에 관한 연구

It is often the case that various kinds of language listening tests are held in high school classrooms. Noise sources of air conditioner and fan are the major variable factor of listening environment in the classroom. The noise sources occurred in the classroom may influence the listening environment. So in this study, acoustical measurements were carried out in the two different classroom. According to the noise sources, the D50 value had a little change in the low frequency ranges. But these results appear to have little influence on the STI value.