http://www.sciencedaily.com/releases/2014/06/140611171006.htm
This brings sound waves and plasmons together.. maybe the old tale of striking a raised limestone block and scooting it 2 bowlengths had a seed in reality? Nano geometry of an alkali metal, calcium, being agitated by a ringing sound source into resonance effecting ambient gases to form plasmons :_) hijacking allowed since it was really only my intention to discuss the article not levitation.
