A study on enhancement of existing noise barriers in Railways

초록

Within the framework of a research project “Noise and vibration reduction technology development for speed increase in railways” which is supported by the Ministry of Knowledge Economy, conventional Korean railway noise barriers have been studied with the purpose of the enhancement of the shielding performance. Main research objects for the technical improvement are incidencing noise from upper part of high speed trains and the low frequency noise radiated by diesel locomotives. Another issue is the high positioned receiver points at the high-rise buildings. First the noise characteristics and environment of several civil claim sites are investigated by means of measurement and noise map. With theoretical models and analytical studies the effects of variation in the acoustical impedance of the upper edge on the improvement efficiency are investigated. The results at different critical receiver points for target frequencies are shown and possible acoustical concepts for the additional edge devices are discussed.