Sound therapy

Abstract
MOST of us who have recently become parents are familiar with the use of ultrasound in medicine. We have seen "baby's first picture" and thrilled to the ghost-like images of the head, the beating heart and perhaps even the face. These images are produced by ultrasound: a transducer projects high-frequency sound waves into the uterus and collects the reflected waves, which are then used to build up an image.

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