Ketchum & Walton Co. specializes in noise control and reduction through architectural, HVAC and interior design methods. The company conducts research and development on a broad range of noise-reducing techniques. It also provides air filtration services. Ketchum and Walton partners with such companies as IAC, Kinetics Noise Control, Camfil & Parr, Purafil, Novawall and UVDI.