Sonova Holding AG manufactures and sells hearing care solutions for children and adults in Switzerland, the United States, rest of the Americas, Europe, the Middle East, Africa, and the Asia Pacific. It operates through two segments, Hearing Instruments and Cochlear Implants segments. The Hearing Instruments segment engages in the design, development, manufacture, distribution, and service of hearing instruments and related products, as well as wireless headsets, speech-enhanced hearables, and audiophile headphones under the Phonak, Unitron, Hansaton, and Sennheiser brand names; and audiological care services under the AudioNova, Audition Santé, Boots Hearingcare, Connect Hearing, Geers, Hansaton, Lapperre, Schoonenberg, and Triton Hearing brands. The Cochlear Implants segment is involved in the design, development, manufacture, distribution, and service of hearing implants and related products under the Advanced Bionics brand. The company sells its products directly to end consumers through its own store network; wholesales to independent audiologists, third party retail chains, and multinational and government customers; and provides hearing care services through a network of stores and clinics. The company was formerly known as Phonak Holding AG and changed its name to Sonova Holding AG in August 2007. Sonova Holding AG was founded in 1947 and is headquartered in Stäfa, Switzerland.