Patterns Of Sound Visualized In Sand

Brusspup video1

YouTube user brusspup blends science, illusion, and art into double-take inducing videos. Sand is used to create amazing patterns that are called Chladni figures.  Brusspup pours sand on a metal plate that is connected to a speaker and tone generator.  Various frequencies create different patterns of sand on the plate, higher frequencies creating more complex figures.  Different portions of the plate do not vibrate with each frequency.  The sand naturally accumulates in these areas of no frequency, creating a visualization of the sound traveling the metal plate.   [via]

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