Theremin, Leon(thĕr`əmən), 1896–1993, Russian engineer and inventor, b. St. Petersburg as Lev Sergeyevich Termen. He studied and worked in his native city, attending its university and conservatory and directing a lab at one of its technical institutes, where he invented the theremintheremin
, one of the earliest electronic musical instruments, invented (1920) in the Soviet Union and named for its creator, Leon Theremin. A forerunner of the synthesizer, it consists of a wooden box fitted with two radio-frequency oscillators and two metal antennas, a
..... Click the link for more information. , an early electronic instrument. In 1927 he moved to New York City; there he developed new musical instruments and other inventions. In 1938 he abruptly returned to the USSR; many believe that Soviet agents kidnapped him. Accused of anti-Soviet activities, he was sent to a labor camp. During World War II, however, his talents were in demand and he was transferred to a military laboratory. There he invented submarine tracking systems, remote controls, and a miniature eavesdropping device. He later taught at the Moscow Conservatory and worked at the Moscow Polytechnic Institute.
See biography by A. Glinsky (2000).