While we’ve seen examples of objects suspended mid-air using quantum levitation and acoustic levitation, a team of three Japanese engineers from The University of Tokyo and the Nagoya Institute of Technology recently unveiled an ambitious device that uses sound waves to move objects through three dimensional space.
The machine uses four arrays of speakers to make soundwaves that intersect at a focal point that can be moved up, down, left, and right using external controls. You would think such machine would be extremely loud, but according to one of the engineers the device uses ultrasonic speakers and is almost completely silent. You can read more about it via Reddit.
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