How to make various materials levitate using acoustics

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Yoichi Ochiai, Takayuki Hoshi and Jun Rekimot, from Japan, demonstrate that various materials could be manipulated with acoustics. They considered extended acoustic manipulation whereby millimetre-sized particles were levitated and moved 3D by localised ultrasonic standing waves, which were generated by ultrasonic phased arrays.

“Our manipulation system has two original features. One is the direction of the ultrasound beam, which is arbitrary because the force acting toward its centre is also utilised. The other is the manipulation principle by which a localised standing wave is generated at an arbitrary position and moved three-dimensionally by opposed and ultrasonic phased arrays. We experimentally confirmed that various materials could be manipulated by our proposed method”, says Yoichi Ochiai (The University of Tokyo).

 

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