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 Caltech researchers create 'sound bullets'

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Date posted: 24/04/2010

Caltech researchers have built a nonlinear acoustic lens that produces highly focused, high-amplitude acoustic "sound bullets" that could be used for more powerful medical ultrasound imaging and for hyperthermia procedures.

The device is a longer version of a Newton's cradle toy, which consists of a line of identical balls suspended from a frame by wires. In the lens, a pulse is excited at one end by an impact with a striker, and nonlinear waves are generated within chains of balls.

See the full Story via external site: media.caltech.edu

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