Development of the sound barriers for speeding up the Joetsu Shinkansen

Considering speed increase in the future, noise prevention is a major issue for railway enterprises. In this paper we present an example of noise control measures for speeding up the Joetsu Shinkansen. We develop a new sound absorption panel to be attached to the inside of viaduct sound barriers and to use that in optimized combination with edge-shaped device where acoustical devices are attached to the top of sound barriers.