Rubber part for interior of metal sound barrier and application thereof

The invention discloses a rubber part used in a metal sound barrier and application of the rubber part. The rubber part comprises an upper top face sealing body, a left side face sealing body, a lowerbottom face sealing body and a right side face sealing body which are arranged on the periphery of a light sound absorption plate and matched with a sectional material. The upper top face sealing body is composed of a first double-pipe rubber pad and two wings of an arc structure, and the two wings are located on the two sides of the first double-pipe rubber pad respectively, so that the upper top face sealing body is of a U-like structure. The left side face sealing body is composed of a second double-pipe rubber pad. The lower bottom face sealing body structure is the same as the upper topface sealing body structure, and the right side face sealing body structure is the same as the left side face sealing body structure; and the upper top face, the left side face, the lower bottom faceand the right side face sea