Abstract
An impulsive pressure wave radiated from a tunnel exit portal, called a micro-pressure wave, is one of the important wayside environmental problems in high-speed railways. We have proposed a new countermeasure against the micro-pressure wave, which is a hood with an inside partition installed at a tunnel exit portal. Since Shinkansen tunnels are double-tracked tunnels, an opposite train enters the hood. Consequently, it is necessary to estimate the effect of the inside partition on the compression wave generated by the opposite train. In this paper, the effect has been clarified by an acoustic analysis and model experiments.
