Why Japan’s high-speed railways are particularly shaped like Hoba Bat

When a high-speed train enters a tunnel, there is a very loud noise caused by compressed air.

It is said that it is shaped like Hobabat to reduce this.

It is said that the Hovabat shape is better for removing air than the Rainer Gao shape.

It is said that tunnels in Korea are larger than those in Japan, so they do not have the shape of Hoba Batt.

This is the new high-speed railway, Cheongryong.