The patterns made in sand by various levels of sound...watch this!
I wonder what would happen if Adam sang while this was working. Can you imagine how he'd blow the sand off the board?
At what point are you not able to hear the sound anymore?
When is the pitch too high for human ears?
For your ears?
When this video is over, check out the other videos shown at the bottom of the screen. Very cool!
"Since light travels faster than sound, people appear bright until you hear them speak.” ~ Unknown