What are ultrasonic waves? Write any of its three applications.
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ultrasound is a sound f waves with frequencies higher than the upper audible limit of human hearing
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Ultrasound is used in many different fields. Ultrasonic devices are used to detect objects and measure distances. Ultrasound imaging or sonography is often used in medicine. In the nondestructive testing of products and structures, ultrasound is used to detect invisible flaws.
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