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24,247,901 results
Hey kids! Doesn't it get annoying when someone calls you but you don't hear it ringing because of the silent mode? Doesn't ...
2,748,739 views
7 years ago
Acoustic Geometry shows how sound works in rooms using Nerf Disc guns, 1130 feet of fluorescent green string, and Moiré ...
2,810,252 views
10 years ago