A noise barrier is an artificial barrier installed between a noise source and protected object serving as a noise reducer. A noise barrier is a prefabricated structure consisting of bearing supporting racks and various types of acoustic panels mounted between them. Noise barriers of 100 mm wide are produced from a composite material and interlock with each other by groove-and-tongue joint. Front side of the panel (turned to noise) is made in two variants: solid and perforated. Noise-absorbing material like mineral wool is inserted inside the panel.