Sonic tractor beam forms acoustic holograms to lift objects

The sonic tractor beam is capable of levitating and manipulating a small polystyrene bead

Last year, researchers at the University of Dundee revealed an acoustic tractor beam that used ultrasonic energy to pull macroscopic objects in. Now researchers in the UK have developed a sonic tractor beam that generates acoustic holograms through the manipulation of high-amplitude sound waves. These acoustic holograms, which can take various shapes, such as fingers, cages and vortexes, are able to pick up and move small objects like polystyrene beads.

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Section: Science

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