I was listening to the Project Camelot interview with Ralph Ring from 2007, and he mentioned an experiment he performed in the fifties where he levitated a ping pong ball using "28,000 cycles" sound (above the range of human hearing).
I couldn't find footage of Ring's original experiment, which someone had allegedly replicated in the 1980's, but I did find these, using 30mhz(!). Real tasty.
Videos were acquired in the fluids laboratory of Dr. John R. Saylor, Dept. Mechanical Engineering, Clemson University.
Afternoon update: so, that was interesting, but then I did a little more research and found THIS, the latest update from Search4TruthReality showing a mini-version of Ralph Ring and Otis T Carr's flying UFO which apparently works via concentrated mind control. I also love Ralph Ring's PATENT-FREE concept of distribution of 'the truth'. Aquamarine Dreams indeed.
As I've said before on Free Planet, I could really see this technology being used in the Floating Homes, peanut taxis and Floating Institute for Creativity, Passion and Kinship.