Theremin

The theremin /ˈθɛrəmɪn/, originally known as the ætherphone/etherphone, thereminophone or termenvox/thereminvox is an early electronic musical instrument controlled without discernible physical contact from the player.

It is named after the westernized-name of its Russian inventor, Léon Theremin, who patented the device in 1928. The controlling section usually consists of two metal antennas which sense the position of the player's hands and control oscillators for frequency with one hand, and amplitude (volume) with the other, so it can be played without being touched. The electric signals from the theremin are amplified and sent to a loudspeaker.

The theremin was used in movie soundtracks such as Miklós Rózsa's for Spellbound and The Lost Weekend and Bernard Herrmann's for The Day the Earth Stood Still and as the theme tune for the ITV drama Midsomer Murders. This has led to its association with a very eerie sound. Theremins are also used in concert music (especially avant-garde and 20th- and 21st-century new music) and in popular music genres such as rock. Psychedelic rock bands in particular, such as Hawkwind, have often used the theremin in their work.