Check out this "Hearing-motion Demo".
Some people hear motion, and see sounds.
Do you hear anything when viewing the moving dots? Play the movie repeatedly for best effect.
Edit: Oh, it is called >Synesthesia<
I didn't hear anything, but after three nights of no sleep and with everything going on in my household at this time, I found myself just sitting there clicking the arrow repeatedly.
Thanks for the brain break Tensor, I needed it.