아라우카리아의 실내소음 저감특성에 관한 실험적 연구

Because of the growing population and theincreased use of machinery, indoor noise which is invisible pollution, is threatening human health. Indoor noise can absorb, deflect, refract, and reflect sounds. In addition, the vibration of a sound wave is absorbed by leaves, branches and soil. Therefore, in order to understand the properties of indoor sound environment in accordance with the availability of indoor plants, a basic study on the indoor noise reduction effect of plantation in an indoor space was conducted. In this study, experiments were conducted in three different environments : space with no plantation, a space where 3% of the total room volume was planted with Araucaria, and was deployed with paper-based structures. A high frequency non-directional sound source (Supper Tweeter Source) was set up in an indoor space (5.0m×5.0m×2.5m) to measure indoor noise. The results showed the change of 1) NRC, RT, EDT, D50 with plantation in a room, and 2) in particular, it was much more effective in a low frequency band. Overall, it showed that it is effective in reducing the amount of noise stress that people under go when they occupy a room.