I've checked all your videos. Your channel is a goldmine, thank you for sharing your knowledge on the matter and synthesizing it into practical videos.
Your explanations are great but I still want to point something out. Objects in space (such as air) can only occupy one place in space at a time. So there is no superimposition of waves in the real world (at least at macroscopic scale).. It is true that we do hear harmonics but that is only because of the way our ears do natural Fourier transformation on the waves they receive, as you explained. However, harmonics are not real in a physical sense (unless you have a multitude of little speakers producing sine waves which result in one and the same block of air moving in a square wave fashion). I might be wrong, but whenever someone explains this it seems they forget that an object's movement cannot be described by more than one wave at a time. You mentioned speakers in an earlier response. From what I could gather, different parts of a speaker move differently, but there is no superimposition of waves in one and the same part of the speaker.
Wow, I had no idea. Biological engineering is astonishing. Do we know what the update rates are like? Is it more like a Fourier transform, or like wavelets (with a varying temporal footprint)?
