I wanted to check out the new YouTube embed player, where the menu button reveals a Dock-like UI for related movies. So here are video demos of Chladni (intense example here) and cymatic patterns showing how a sound vibration effects media (powders) through a substrate. The form the sound takes depends on the nature of the media and reveals the nodal structure of the substrate from which particular tones emerge. Chladni patterns are still used in in musical instrument research; the best cymatics examples don't seem to be on the web right now, except a sample of Han Jenny at bottom.
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