RPG Diffusor Systems Sound is attenuated by absorption, re-directed by reflection, and uniformly distributed by diffusion.  RPG Diffusor Systems, Inc. is unique in the home theater industry due to its product quality, breadth of its expertise, commitment to acoustics, materials research, publication in peer review journals, continuous innovation and educational outreach.  Kinetics Noise Control Since the company's inception almost 50 years ago, Kinetics Noise Control has focused on engineering some of the most innovative products to address vibration and noise control over a wide range of applications, including music listening rooms and home theaters. Audio Alloy Audio Alloy introduced Green Glue in October 2004 for North American distribution.  Green Glue represents a new category of soundproofing technology, providing lower frequency soundproofing than previously available in cost effective and easy-to-use tubes.