Scientists utilized sound waves to lift, rotate and move the
objects in the air. They used the technique and demonstrated a number of feats
including manipulation of water droplets in the mid air, inserting DNA into
cells and mixing up a little instant coffee.
They utilized 160 decibels of sound with the frequencies out
of the range of human hearing i.e. 24 KHz. The movement itself is controlled by
a grid of sound-emitting squares. Once the object was in the air, it could be
moved around by reducing the volume on one grid point, and elevating it on the
next.
Scientists are thinking to use the same technique to move
and rotate the bigger objects.
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