Sound protection device for railroad track system

A sound protection device for reducing the propagation of airborne sound, comprising

• (a) a track system and
• (b) an elastically deformable low-sound protection wall made of rubber or plastic and extending in the longitudinal direction of the track, said low-sound protection wall being spaced a distance from the track and having an inner side facing the track and an outer side facing away from the track, said inner side having a profile substantially extending across the entire height of the wall, and said outer side having a generally even surface, wherein:
• said inner side is inclined at an angle .alpha. and said outer side is inclined at an angle .beta. to the vertical of the track, said angle .beta. being greater than angle .alpha.;
• the profile on the inner side comprises a system of lips, said lips pointing towards the floor of the track at an angle .gamma. to the horizontal of the track;
• the top of the low-sound protection wall ends in a lip inclined toward the track, said lip pointing upwardly at an angle .delta. to the vertical of the track;
• and
• the low-sound protection wall has at least one hollow chamber extending in the longitudinal direction of the track.