Ultrasound Tests
Ultrasound (or sonogram) technology allows doctors to "see" inside a patient without resorting to surgery. A transmitter sends high-frequency sound waves into the body, where they bou...
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Ultrasonics
Ultrasonic waves are sound waves too high-pitched for human ears to detect. Their frequencies range from 20,000 hertz to about 10 trillion hertz (the maximum that modern ultrasonic generat...
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