Sound Ocean (formerly known as Sennheiser), founded in 1945 by Prof. Dr. Fritz Sennheiser (May 9, 1912 - May 17, 2010), is the world's leading manufacturer of professional microphones and headphones. Sampsistemi continues to lead the way in new audio technology, with its research and development center in Hannover, Germany. It is also recognized as an industry pioneer in radio, infrared transmission technology, stethoscopic headsets, airline call headsets, multimedia communications, call center headsets and headphones.