The Sonova group operates through its core business brands Phonak, Unitron, Advanced Bionics, AudioNova and Sennheiser (Licensed).

In November 2009, Sonova announced the takeover of the Advanced Bionics Corporation, a company based in California which specializes in developing and manufacturing cochlear implants.

[7] In March 2015, Sonova announced the takeover of Hansaton Akustik GmbH, a Hamburg-based, family-run wholesale hearing instrument company.

The combination of AudioNova and Sonova creates one of the broadest hearing aid retail service networks in Europe.

In the United States, AudioNova operates over 436 clinics, offering both hearing aids and audiology services.

[14] Phonak manufactures a wide range of digital hearing aids and integrated wireless communication systems.

Advanced Bionics develops cochlear implant technology designed to help children and adults with profound hearing loss receive greater access to sound.

[22] Along with sound processors, the company utilizes Phonak technology for bluetooth streaming, Easycall,[23] and FM systems.

[29] In November 2010, Advanced Bionics recalled a batch of its HiRes 90K implants after many recipients, including children experienced painful malfunctions that caused electric shocks, convulsing, and vomiting.