In previous paper, we proposed a reduction method of sound transmission by active control of the incident sound to the wall. For the method, we developed the thin and the light type active transmission loss control module for reduction of the incident sound to the wall. The active transmission loss control module is composed of piezoelectric loudspeakers, an error microphone, and a single input-single output analog feedback controller, and each of the active transmission loss control modules are enabled as the feedback controller which became respectively independent even if more than one are arranged. In this paper, we simulated the sound pressure distribution in the high-speed railway vehicle by using measured vibrations data of the internal wall. And we predicted the effect that reduce the sound pressure in the high-speed railway vehicles by the active transmission loss control modules.