Sonic levitation has been talked about for years. If you have not seen the coral castle which the rumor has it Edward Leedskalnin used sonic levitation or sound waves to move the rocks around. It is interesting that in 1920’s and 1930’s a single man was moving rocks around that are twice the size of the largest stones of the Great Pyramids.
Sound waves don’t discriminate, however, and physicists worked out the basic principle of “acoustic levitation” nearly a century ago. A vibrating plate generates a sound wave that bounces against another surface to create a stable standing wave.