World's first sonic tractor beam

By Jim Drury British researchers have built the world's first sonic tractor beams that lift and move objects using soundwaves. A team from the universities of Bristol and Sussex, in conjunction with Ultrahaptics, a spin-off set up by Sussex Professor of Informatics, Sriram Subramanian, used high-amplitude soundwaves to generate an acoustic hologram that can pick up and move small objects. The device allows the manipulation of small spherical objects in mid-air by individually controlling 64 mini