Noise reducing equipment

Noise reducing equipment for use in combination with a vertically oriented sound barrier wall having a top end and opposite sides for reducing the noise generated from a source of sound located on one of the sides of the sound barrier wall comprising an assembly composed of a predetermined number of interconnected resonant chambers mounted in tandem to said sound barrier wall in a relationship such that the assembly extends from said sound barrier wall on the side thereof opposite the source of sound with the resonant chamber closest to the sound barrier wall having a volumetric area larger than the volumetric area possessed by each of the other resonant chambers and further comprising an additional sound barrier section extending from the most distant resonant chamber relative to the location of the sound barrier wall with the sound barrier section being of a length sufficient to further extend the noise reducing equipment a predetermined distance laterally from the sound barrier wall on the side thereof opposite the source of sound.