Question

what is ultrasound? explain its working principle . what values are shown by Rita and her neighbours?

Answer 1

sound or other vibrations having an ultrasonic frequency, particularly as used in medical imaging......
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Answer 2

Ultrasound- the high range of sound mean the range of sound is high from the hearing range is called ultrasound. It used in measurements the depth of water. It value is more than 40000 Hz.