Eastern-European Journal of Enterprise Technologies | 2021
Revealing the effect of rounded noise protection screens with finite sound insulation on an acoustic field around linear sound sources
Abstract
16 Noise protection screens can be divided into 3 types by their structure: – monolithic, made from heavy materials (concrete, brick, stone, etc.); – sandwich panels, made from two layers of sheet material (steel, aluminum, wooden panels, polycarbonate, etc.) with a gap filled with elastic material; – sheet materials (polycarbonate, acrylic, wood-chip and fiberglass panels, etc.). Screens of the last two types are widely used in the world due to the light-weight structure, the possibility to quickly dismantle or replace damaged elements, as well as the relatively low cost of the entire structure. At the same time, such screens have a much smaller mass, hence the lower natural sound insulation, especially in the domain of low frequencies. This causes the sound wave, which propagates from the traffic noise, to partially pass through the screen and enter