Ultrasonic levitation
Scientists can float objects in mid-air, using just the power of sound. Now, using ultrasonic speakers, they can levitate things with more control ...
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![Three-Dimensional Mid-Air Acoustic Manipulation [Acoustic Levitation] (2014-)](https://sun9-79.userapi.com/jZefcZwgosOh6o8xTniI50dG73fkop_KZ8l2Ig/7lIKCbFhPvs.jpg)
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