see how sound works...
if you have 12 minutes to spare, get ready to learn more about your perception of sound than you assumed you knew previously... well, at least for me. it's rather fascinating to learn, though far from fully understanding, how exactly all this sound and vibrations get understood by your brain.
(via: http://thedailywh.at/2011/08/22/this-is-informative-you-should-watch-it-of-th...




