Sound:proofing wall for reducing noise from rail vehicles

摘要: Noise emitted by rail vehicles is absorbed a soundproofing wall comprising elements (4) which are built up with hydraulic binder and aggregate, such as broken stone chippings, over supports. The crown of the has caps (20) flat material continuous perforations V-shaped configuration providing reduced resistance to air flow. Insulating e.g. mineral fibres can be provided in cap may mfd. from metal, partic. stainless steel, or plastic, polypropylene.