Stationary noise sources that stem from machinery such as compressors, grinders, pumps, condensing units and generators all combine to produce excessive levels of noise.   To lower the exposure levels, a simple sound barrier curtain system can be custom built around the unit.   Individual sound barrier blankets can be custom fit for all four sides and the top to trap the noise and protect the surrounding environment.   These custom noise control curtain systems can be customized with windows, doors, vent hoods, patches, cutouts and a variety of other cutouts designed to make the treatment work for most any stationary noise source.   For more information, call the help desk at NetWell Noise Control at 1-800-638-9355 or visit them online at www.controlnoise.com.