In 2002, Siemens, now Sivantos, launched Triano, the first hearing instrument with three microphones. This new hearing system focused on patient comfort by offering an algorithm that analyzes the environment and automatically made the appropriate signal processing changes.

The history of electrical hearing assistance instruments originated with technological advances in telephones at the end of the 19th century when Werner von Siemens integrated a horseshoe magnet in the receiver of a telephone, and succeeded in substantially improving transmission quality in the telephone.