The Theremin

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Invention
Leon Theremin, originally Lev Sergeyevich Terman, invented the theremin during Soviet research into proximity sensors. He discovered that an electrical signal changed when an object was near an antenna, leading him to create an audio tone that varied with distance. His musical background inspired him to experiment with the device, eventually adding a second antenna to control volume. By November 1920, Theremin gave his first public performance, captivating audiences with this novel instrument 1.
Demonstrations
The theremin's early demonstrations were met with awe and curiosity. The instrument's unique sound and the fact that it was played without physical contact made it a sensation. Theremin's performance for Lenin and subsequent tour to promote the instrument highlighted its potential and secured patents in major capitalist countries 1.
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