This video describes a volumetric display I designed and built that uses a phased arrray of ultrasonic transducers to levitate a 1mm foam ball and move it at speeds greater than 1m/s. The POV effect makes it seem as if you're drawing in mid-air!

This was such a fun project - I still giggle (maniacally) when watching this thing go. There's something truly magical about watching something levitate in mid-air and then start zipping around so fast, you can't see it.

You can find all the design files here: [ Ссылка ]

References:

PhysicsGirl acoustic levitator:
[ Ссылка ]

Acoustic levitator Instructable:
[ Ссылка ]

University of Sussex video:
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University of Sussex paper:
[ Ссылка ]

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