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 Richard Feldtkeller [de].
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.
Zwicker, together with Richard Feldtkeller, was author of the standard work for psychoacoustics Das Ohr als Nachrichtenempfänger.