So much deception....
Sound vibrations are different than electromagnetic frequencies. Yes, there are demonstrations using sounds to kill cells, and there's radiation cancer treatment, but Rife has nothing on common with either. The Rife devices I've been around use something like a neon tube. That means the wavelength or wavelengths, and therefore the frequency, is fixed. The supposed frequency is produced by pulsing the electricity to the tube. This does not change the electromagnetic radiation.
Finally, claiming everything vibrates, has energy, or certain frequencies, is intended to confuse people. These are things that are taken out of context and misapplied, often to apply spiritual ramifications to otherwise understood physics.