I had a likewise rational, logical, intelligent friend who was immersed in Tesla. He tried to convince me that sound is on the electro-magnetic spectrum, among other nonsense.
I have a professor friend who for awhile was president of the Tesla Society. He was constantly fighting off all kind of nonsense about Tesla. Your example is one of 100s!
What are you talking about?
Sound is a tad bit below the ultraviolet spectrum.
My bud mike told me so....