Fokker, Adriaan Daniël
Physicist, musicologist, and curator of the Physics Cabinet at Teylers Museum (1887 - 1972)
The cousin of aircraft-builder Anthony Fokker, Adriaan Fokker was professor of physics at the university of Leiden from 1928 to 1955, and curator of the Physics Cabinet at Teylers Museum. In the 1920s and 1930s he gained an international reputation as a physicist.
Fokker researched ‘microtonal music', a generic term for different sorts of music whose tonal systems diverge from the system that is considered usual in Western music.
He also designed a 31-tone organ, which was installed in Teylers Museum for demonstrations. In 1960, Professor Fokker founded the Stichting Nauwluisterendheid (i.e. the Close-Listening Foundation), which, as the Huygens-Fokker Foundation, now looks after the organ and disseminates the music. The organ is no longer in the Museum, but in Muziekgebouw aan het IJ in Amsterdam.