I'm trying to visualize how sound waves work and I was curious about something.
So sound moves in longitudinal waves, which I think I understand.
There is a really good khanacademy video explaining this.
In the video the air particles are depicted as moving from left to right (longitudinally). But do they ever move up and down even a little bit? Are they on some kind of fixed axis where they can only move longitudinally and never move even the slightest bit in a vertical direction?