The theremin is one of the earliest electronic musical instruments, an the first musical instrument played without being touched (originally pronounced [ˈteremin] but often anglicized as IPA: /ˈθɛrəmɪn/, theramin, or thereminvox, it is also known as an aetherphone.) It was invented by Russian inventor Léon Theremin (Russian: Лев Сергеевич Термен) in 1919. The controlling section usually consists of two metal antennas which sense the position of the player's hands and control radio frequency oscillator(s) for frequency with one hand, and volume with the other. The electric signals from the theremin are amplified and sent to a loudspeaker. The theremin is an electrophone, a subset of the quintephone family.