철도 방음벽의 전면 타공과 흡음재에 의한 흡음성능 고찰

Investigation of Sound Absorbing Characteristics of the Railway Noise Barrier by Changing the Configuration of the Front Perforated Panel and Absorbing Material

This study focused on the identification of sound characteristics according to the configuration of sound absorption material and perforated panel dimensions. Noise barriers consist of front perforated panel, sound absorption material and back plate. Noise barriers' acoustic performance should be required to meet the NRC of 0.7. The absorbing performance of the noise barrier relies on the opening ratio of perforated panel and the efficiency of the absorbing material. This study try to find out the possibilities of applications to railway usage.