Ancient Aliens need not apply. Amazing work in acoustic science proves sound waves have more potential than most would believe. I can only imagine the future interfaces and displays created with this outstanding tech.
The essence of levitation technology is the countervailing of gravity. It is known that an ultrasound standing wave is capable of suspending small particles at its sound pressure nodes and, so far, this method has been used to levitate lightweight particles, small creatures, and water droplets.
Our manipulation system has two original features. One is the direction of the ultrasound beam, which is arbitrary because the force acting toward its centre is also utilised. The other is the manipulation principle by which a localised standing wave is generated at an arbitrary position and moved three-dimensionally by opposed and ultrasonic phased arrays. We experimentally confirmed that various materials could be manipulated by our proposed method.
Yoichi Ochiai (The University of Tokyo)
Takayuki Hoshi (Nagoya Institute of Technology)
Jun Rekimoto (The University of Tokyo / Sony CSL)