การประยุกต์ใช้วัสดุดูดกลืนเสียงเพื่อลดมลภาวะทางเสียงจากการจราจรใต้สถานีรถไฟฟ้าบีทีเอส

Abstract

This article aims to provide the design and application of sound absorbing materials to reduce the noise pollution from traffic under the Bangkok Mass Transit System (BTS) station, where the sound pressure levels (SPL) were louder than normal road traffic noise due to limitations of the project location. This sound pollution has had an impact on the mental health of those who used the facility and lived in the area. The research procedure included a noise simulation model of the environment by modeling the area below the platform of BTS station to the ground for comparing the sound pressure level of the studied area with that of the nearby road traffic noise. The test results show the shapes of sound absorbing materials and the locations for installation. It also shows the existing noise pollution and the physical characteristics of BTS station. The increased noise level below the BTS station platform is caused by the sound reflection in the space below the platform. The most effective method for installing the sound absorbing materials is to install below the beams of BTS station platform in the angle of 45 degree. The method in this study can reduce the sound pressure level by 4.3 dBA. The results can be applied as a guideline for the design of skytrain station in a limited area to mitigate the road traffic noise below the station platform.