The idea of treating maladies of the mind by blasting the brain with noise sounds, to the layman, like kicking a television set in order to repair it. It is, however, on the cards.rnThe noise in question is ultrasound. This has been used for decades to scan human interiors-particularly wombs containing developing fetuses. The ultrasound is reflected from surfaces within the body (such as the skin of a fetus) in the way that audible sound echoes from a cliff face. William Tyler and his colleagues at Arizona State University, however, want to take things a stage further. They think that ultrasound might be used therapeutically as well.
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