It's possible actually to see the overtones of a sound in the horizontal stripes they create.
But this view is not just pretty, it can also be useful for dealing with identifying and removing specific frequencies, like electrical hums - but also the bane of voice actors' lives that is the mouth click.
There are lots of suggestions for preventing naturally-occurring mouth clicks, from drinking lots of water, chewing on green apples, drinking apple juice or avoiding dairy products, but even with these precautions they can still creep in.
But now look at exactly the same wave form in the spectral frequency display.
Yes, clicks are still irritating and fiddly, but, thanks to spectral frequency analysis, a little bit quicker and quite satisfying to squish.