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Using Sound To Levitate Objects..

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Using Sound To Levitate Objects..

Post by sn » 03 Jan 2014, 21:17

..And Move Them Midair:
Researchers in Tokyo have put a new twist on the use of sound to suspend objects in air. They've used ultrasonic standing waves to trap pieces of wood, metal, and water – and even move them around.
... The device uses sound at the frequency of 40 kHz — beyond the upper limits of human hearing at 20 kHz.

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