A turnout system which permits trains to pass from one track to another is a combination of the switch, the crossing, lead rails which are necessary to connect the switch and the crossing, two guard rails and a switch machine for operating the switch. In Korea, it has been planned to adopt the high speed tilting train which is suitable for the circumstance of Korea and operates at the maximum speed of 180 km/h, at conventional lines by the year of 2010. For the present, the prototype of the tilting train has been fabricated, and has undergoing a trial run. In this study, evaluation of noise around the turnout system induced by the tilting train has been implemented through the field measurements.