抄録
The wayside noise around a tunnel portal of Shinkansen mainly consists of both the noise radiated from the tunnel portal and that from an open section. This suggests that the wayside noise around the portal tend to be greater. In past studies, the model to predict the noise around the portal for Shinkansen was proposed, in which both the road traffic noise prediction model (ASJ RTN-Model 1998) and Shinkansen noise prediction model are combined. The predictions with this model tend to be overestimate, although the overall trends are well-predicted. In this study, the laboratory experiment using the scale models has been carried out in order to investigate the contribution of both the noise radiated from a tunnel portal and that from an open section to the total wayside noise. It is found that, at the measuring points near the portal, the noise from the portal has much greater contribution to the total noise. And, it is also found that the noise is screened due to the vehicle at the open section.
