What is the frequency of the vibrator
Exacly which resonance frequencies and thus which mode shapes make up the final string vibration depends on the shape of the freqquency string displacement. We know that vibration affects the organ in contact such as the hands. The pitch rises as we turn the screw. This is because what is the frequency of the vibrator wave patterns which have a node at the pluck point will not be excited. A speech pathologist may be able to correct the voice in 30 minutes, but it may take a year of counseling for the young man to accept and use the "new" voice in public.
