Live from science fiction, in the laboratories of the University of
Bristol and the Sussex was built the first device that can grasp and
lift an object with waves sonoreIn direct from science fiction, in the
laboratories of the University of Bristol and the Sussex was built first
device that can grasp and lift an object with sound waves. For
now works with tiny objects, and certainly will never capture
spaceships but the study published in Nature Communications is the proof
of principle of the ability to move objects without physical contact
and may one day allow, for example, to drive capsules of drugs or micro
instruments Surgical through the human body. The concept
behind the 'radius' tractor created by British researchers is rather
simple and uses acoustic waves, ie vibrations that propagate in the air,
that they are sufficiently intense can push a small object. The winning idea was to harness the power of the waves using many sources of different sounds and controllable. In
practice the researchers placed 64 well micro speakers on a flat and
found the right combinations of sounds whose vibrations 'entangled' with
each other are able not only to push a small object but to manipulate
it at will. "We already knew that the sound waves can have
physical effects on objects - said Bruce Drinkwater, of the University
of Bristol - but in this case we have learned to control the sound to
new heights." The result is a device that can create move
two small objects of up to 1 mm, until they touch, rotate them, attract
them or keep them suspended in the air. "Our tool - said
Sriram Subramanian, University of Sussex - manipulate objects in the air
seemingly eliminating the gravity. We do this by controlling
individually dozens of boxes that generate a 'hologram noise' that can
manipulate more than one object real-time and without touching them. " Trap
as spaceships in Star Trek would not be possible, because the sound
waves do not propagate in a vacuum, but this new technology could find
applications in many areas where it is important not to contaminate
objects. For example, to combine chemical molecules 'pure' or to carry a day medication within the human body in a perfectly controlled.
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