Calculation specification of acoustic screens located in production area

Acoustic screens are one of the means to provide sound insulation and noise reduction on its path from the source to the target point (TP, the workplace). The advantages of the acoustic screens are constructive simplicity, light weight, and relatively low cost. A distinctive feature of an acoustic screen as a sound insulation system is that the area of maximum attenuation is located in close proximity to the screen. The efficiency effect of the screens is determined by the following factors: -a small size of the noise source; - the conversion of high-frequency components of the source noise spectrum; - the location of the work area outside the technological machine; - a short distance from the noise source to the operator's station. All that fully applies to the equipment for various applications, in particular, for the metal and woodworking machinery (lathe, milling, grinding), gear-boxes, and engines on the running sites. The existing detailed screen calculations are designed for screen installation. At free atmosphere, the formation of the acoustic field under the screen installation inside the production areas differs essentially due to the multiple reflections of sound waves. The studies on the acoustic performance of screens inside the production are resulted in the paper.