고속철도 용 소음저감장치의 성능 고도화 및 상용화

When the speed of the high-speed train increases from 300km/h to 400km/h, the environmental noise is increased about 7dB.Two types of noise reduction devices were developed from the first stage of research from 2010 to 2014 to economically and efficiently cope with the increased noise. One type is the noise reduction devices installed on the top of noise barrier or wall in the railway. The other one is a noise absorbing block that is installed on the concrete slab to reduce concrete reflection noise. The purpose of this study is to enhance the practical use of the noise reduction device developed in the first stage, and another object is to obtain data for initial design of environmental noise through long-term monitoring. This advanced research is being carried out over two years. In the first year, the economic efficiency and the application method of the developed noise reduction device are improved. Also, monitoring was performed at all seasons depending on train types and speed. In the second year, it will be installed directly on the highspeed railway section to verify economics, workability and performance.