Karl Eberhard Zwicker (15 January 1924, in Öhringen, Germany – 22 November 1990, in Icking)was a German acoustics scientist and full professor at the Technical University of Munich. Zwicker studied physics and electrical engineering at the University of Stuttgart and was an assistant of . In 1967 he was appointed full professor of the newly founded Institute for Electro-Acoustics of the Technical University of Munich. Zwicker developed a method for the computation of loudness, which became a German standard, DIN 45631. In 1964, at Bell Labs, he discovered the Zwicker tone auditory illusion.