Abstract
Radiated sound from floor panels as the structure borne sound propagated from the bogie is one of main elements in the interior noise of railway vehicle. The authors investigated the characteristic of the vibration and the radiated sound of the floor panels in the vehicle interior by shaking tests. In addition, we proposed and implemented two different noise reduction countermeasures. One of which is supporting the floor panels elastically floating floor structure, and the other is supporting "divided" floor panels elastically. As a result of implementing each countermeasure respectively, the reduction effects of vibration and radiated sound have been achieved.
