Funny I just started diving into HAM stuff and for the first time realized that audio and radio were not technically on the same spectrum. I always remember those spectrum line images with light up to cosmic rays at one end and sound near the other, but after realizing radio freq's have a much longer wavelength but the frequency is technically higher really messed me up for awhile.
Now that I understand that radio is a propagation in relation to light and not in an air medium in regards to frequency, what is the highest audio type frequency that can be reproduced? I know we can't hear above 20k, but what is the highest frequency a human can reproduce by moving air pressure? I'm shooting in the dark of course and may have this idea completely wrong, but no doubt it is interesting.
I sort of answered my own question by searching a physics forum, although I no doubt for the most part don't exactly know what they are talking about. One guy suggested that it is possible for lightining to exhibit an air pressure sound pulse of upward of higher than the Gigahertz range of air pressue. Would be cool if this could in any case be recorded and lowered to be heard by the human ear haha.