It was invented around the 1920s, and the inventor, Léon Theremin -- he also was a musician besides an inventor -- he came up with the idea for making the theremin, I think, when he was working on some shortwave radios.
Izumljen je oko 1920. i izumitelj, Léon Theremin -- koji je bio i glazbenik -- došao je na ideju izrade teremina kada je radio na nekim kratkovalnim radijima