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Sonova is based in Stäfa, Switzerland, and is a global leader in innovative hearing care solutions: from personal audio devices and wireless communication systems to audiological care services, hearing aids and cochlear implants. The Group was founded in 1947 and is headquartered in Stäfa, Switzerland. Its brands include Phonak, Advanced Bionics, Unitron, AudioNova, and Sennheiser (under licence.