Whilst generally called antennas, they don't seem to be utilised as radio antennae for obtaining or broadcasting radio waves, but alternatively work as plates of capacitors. The distance from just one antenna decides frequency (pitch), and the space from one other controls amplitude (volume). Better notes are performed by relocating https://jeffreyswofv.blogofchange.com/39058988/mezzanine-safety-gates-uk-fundamentals-explained