400km/h급 고속철도의 소음저감을 위해 방음벽 상부에 설치하는 소음저감장치 개발에 관한 연구

초록

The purpose of this study is to develop a noise reduction device installed at the top of noise barrier for further decreasing of noise level of 400km/h class high-speed railroad. For this, the frequency spectrum of 400km/h class high-speed railroad was analyzed through the field noise test, and the tuning frequency was determined to design a noise reduction device. The noise reduction device was designed to have noise reduction performance of at least 3dB(A) using the prediction method(2D BEM) and through the laboratory test with the prototype. Finally, the outdoor test showed that this device could decrease noise level of 400km/h class high-speed railroad even more than 3dB(A).

키워드