"Royal Rife discovered that specific RF frequencies, when broadcast through a plasma tube towards the body, would only affect the microbes that resonated that exact frequency. And that when that frequency hit that microbe, that it would destroy that specific microbe and have absolutely no effect on anything else.
This revolutionary breakthrough stood on the shoulders of Nikola Tesla’s use of specific frequencies. This began the process of isolating frequencies and matching them to healing."
https://www.soundeducators.com/about-frequency/
"Tesla would fool with some tuners and tune in the right frequency and got 240 volts delivered through the air to his car."
http://waterpoweredcar.com/teslascar.html
"An amplifier’s job is to take a weak audio signal and boost it to generate a signal that is powerful enough to drive a speaker, or in the above case, an electric motor."
https://www.apparentlyapparel.com/news/nikola-teslas-wireless-electric-automobile-explained