From 1950 to 1959, Sessler studied physics at Universities of
Freiburg, Munich, and
Göttingen. He received his
diploma in 1957 and his Ph.D. from the
University of Göttingen in 1959. After working in the United States at
Bell Labs until 1975, he returned to the academia in Germany. From 1975 to 2000, he worked as a professor of
electrical engineering at the
Department of Electrical Engineering and Information Technology of the
Technische Universität Darmstadt where he invented the silicon microphone. In 1999, Sessler was named
Professor emeritus at the same university. He holds over 100 international
patents, among them 18 US-patents. The first one, US 3,118,022, with James E. West, was issued on 14 January 1964. Sessler is the author/editor of several books on
electrets and
acoustics. In 2014, together with
Ning Xiang, he co-edited a memorial book on
Manfred R. Schroeder published by Springer. Furthermore, he is well known for his over 300 scientific papers in prestigious international magazines and journals. Gerhard Sessler was married to Renate Sessler (now deceased) and has three children: Cornelia, Christine and Gunther. == Publications ==