공동주택 내부 공간의 잔향시간 특성 조사 연구

Abstract

In this study, the reverberation time of apartment living room was measured and distribution ofthe reverberation time was analyzed. In addition, sound field characteristics of mock-up test roomsimilar with living room and timber structured bedroom was investigated with addition of furnitureand sound absorption material. Average reverberation time of unfurnished apartment unit was 1.11 s,and reverberation time in 630 Hz~2000 Hz bands were longer than 1.2 s. It was found that from thefield measurement results, reverberation time characteristic of furnished apartment living room wasuniform in most of frequency bands. Averaged reverberation time of furnished living room was 0.48 sand the reverberation time of bedroom was 0.44 s. Standardized sound pressure level correction valueswere calculated from the average reverberation time of furnished and unfurnished apartmentunits. The correction value of unfurnished living room was –3.4 dB and that of furnished living roomwas 0.2 dB. Measured reverberation time of furnished and unfurnished apartment units indicated thatreference reverberation time; 0.5 s, in KS and ISO standards is reasonable also in Korean residentialenvironment.