Noise protection box for noise barrier mounted in e.g. railway track, comprises sound openings that are formed on cover, such that open side of profiled element is sealed

摘要

The noise protection box (1) has several superposed noise protection elements (8) that are supported on base (7) made of reinforced concrete. The protection elements are located in pockets. The top pull joist is located in profiled element. The absorber elements are provided on both sides of web of profiled element. The sound openings are formed on cover, such that open side of profiled element is sealed. The metal rail of profiled element is ethylene-propylene diene monomer (EPDM) and EPDM with steel or aluminum. A biasing wedge of metal rail is made of steel, aluminum or bronze.