Sound resonance patterns as seen in rice

Saw this…it’s pretty cool. I’m not sure if this belongs in Arts or Technology. If you have any dogs make sure they aren’t too close to the speakers…

youtube.com/watch?v=Zkox6niJ1Wc

well, I could hear the sound up until the last 7 seconds or so (with the speakers turned right down - don’t want to upset the co-workers… oops)