While Leon Theremin is mostly known to a wide audience for the thereminvox, his other pioneering work is not less important and should not be forgotten. As it is clear from his biography, he spent a significant period of his life working for state security, and much of that work will probably never be made available to the public. However, even what is known is enough to make one admire his talent, creativity, and determination, all of which he carried throughout his long, difficult, and extraordinary life. Quoting Nick Holonyak, the inventor of the light-emitting diode (LED): “Theremin (Lev Termen) should be known for more than just a musical instrument”.
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Pavel Nikitin (2012) studied this question.
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