A Tendency of Prediction Technique for the Assessment of Railway Noise

Abstract Since 1990s, the railway noise has been researched and developed in our nation. First of all,what’s causing the noise and how to eliminate the cause of the noise must be found out.Secondly, cutting off the propagation path of the noise from the noise source to the receivingpoints. In this study the characteristics of prediction formula for the assessment of railway noiseused in some nations including Korea were investigated. In order to develop the predictionformula of the railway noise, the noise radiated from railway vehicle, rails and sleepers,characteristics of noise barrier, velocity of train, ground effects, roughness should be analyzedand predicted. Especially, on the basis of acoustics, the characteristics of source are applied toacoustic power and directivity information.Key words : railway noise, ground effects, roughness, acoustic power, directivity information Corresponding Author: Young-Min Park, EIA Division, Environment Assessment Group, Korea Environment Institute, 613-2 Bulgwang-Dong, Eunpyeong-Gu, Seoul, 122-706, Korea Tel: 82-2-380-7676 Fax: 82-2-380 -7744 E-mail: ympark@kei.re.kr