Demant A/S develops, manufactures and sells products and equipment designed to aid the hearing and communication of individuals. It operates through the following business units: Hearing Devices, Diagnostic Instruments, Hearing Implants, IT incident and Personal Communication. The Hearing Devices business unit covers hearing system technology and hearing care solutions. The Diagnostic Instruments business unit manufactures audiometers for hearing measurement. The Hearing Implants comprises Oticon Medical brand. The Personal Communication business unit produces communication equipment such as listening devices, sound field systems and sound system for larger. The company was founded by Hans Demant in 1904 and is headquartered in Smørum, Denmark.