Noise e.g. pumping noise, protection device for noise attenuation, has transparent and perforated surface bodies provided to part of walls on their sides, where bodies are spaced from walls that are made of glass or plexi-glass

摘要

The device has an operating chamber (7) for a production and/or experimentation device, where the chamber is surrounded by side and horizontal upper walls (2-6). The walls are formed completely or partially in a transparent manner. Transparent and perforated surface bodies (9) are provided to a part of the walls on their sides, where the bodies are spaced from the walls that are made of glass or plexi-glass. The bodies are kept in the walls by a damping spacer and are formed by thin flexible foils, where a geometrical model forms punched holes of the perforation.