Curiously, most of the vibrations shown are such that you can hear in a very concrete terms. In banging a barrel or a cymbal you can certainly hear the fluctua

Curiously, most of the vibrations shown are such that you can hear in a very concrete terms. In banging a barrel or a cymbal you can certainly hear the fluctuations on the metal surface. But you don't get a proper visual of how the sound actually forms until you see it on the video; when you do, it will just fit.