Through a conference of Electrotecnicians in 1920, he introduced the Termenvoksa or Heterophone, or Theremin, as it was called internationally. Those people on the conference saw a small box with two antennae, one particular on the proper and 1 about the remaining. Could it be a fresh sort of telegraph? https://drum-handling30582.therainblog.com/37092797/the-greatest-guide-to-mezz-barriers