From http://www.youtube.com/v/94KzmB2bI7s

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The movie is of an acoustic levitation chamber I designed and built in 1987 as a micro-gravity experiment for NASA related subject matter. The 12-inch cubed plexiglas Helmholtz Resonant Cavity has three speakers attached to the cube by aluminium acoustic waveguides. By applying a continuous resonant (600 Hz) sound wave, and by adjusting the amplitude and phase relationship amongst the 3 speakers I was able to control levitation and movement in all three (x,y,z) axes of the ambient space. This research was used to show the effects of micro-gravity conditions that exist in the space shuttle environment in orbit, but done here on Earth in a lab.

The images below are of a new eight-times-larger levitation chamber that I designed and my son David, Jr. built in October of 2007. This one is for an upcoming art exhibition next year at the Tate Modern in London.

Dr. David Deak
December, 2007