Whilst typically called antennas, they aren't used as radio antennae for obtaining or broadcasting radio waves, but rather work as plates of capacitors. The space from a person antenna decides frequency (pitch), and the distance from one other controls amplitude (volume). Bigger notes are played by relocating the hand closer https://cablepuller53625.blog5star.com/38838714/detailed-notes-on-mezzanine-safety-gates-uk