A Practical Study of Shinkansen Tunnel Portal Noise Reduction

摘要

The noise from a tunnel portal is the echoing noise emitted from railway cars running in the tunnel. There are two methods to reduce the noise from the tunnel. The first is to interrupt the tunnel portal with a sound insulating board plate that is commonly method. The second methods is to install sound absorbing plate in the tunnel portal. This report describes to the later method with field sound test result.