British scientists create a ‘tractor beam’ of ultrasonic sound
A team of researchers from the Universities of Bristol and Sussex have developed the world’s first functioning sonic tractor beam able to operate outside of a lab environment. The device uses 64 miniature speakers to generate high-amplitude, ultrasonic sound waves. These waves create an “acoustic hologram” (read: force field) capable of moving pea-sized objects without physically touching them. Adjusting the output of individual speakers allows the researchers to move, rotate and hold items at will.
Source: University of Bristol
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