These sound waves can levitate and move particles in new ways

A new device captures particles within a sound field that can be shifted three dimensionally

ultrasonic speaker

UP IN THE AIR  A new levitation device uses ultrasonic speakers to create “sound fields” that contain regions of high-intensity sound (white) and low-intensity sound (black) that can trap particles (green) in midair.  

A. Marzo and B.W. Drinkwater/PNAS 2018

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