Uses of Sound waves - sonar definition - Ultrasound
Boats emit a pulse of ultrasound and then detect its reflection. Using the time difference, the depth of the ocean can be calculated.
Dolphins emit pulses of ultrasound and use the echoes produced to locate things underwater.
USES OF SOUND
Medical staff can use ultrasound to check on the progress of a pregnancy. By emitting ultrasound and using the reflected sound, a computer can produce an image of the fetus.
Seismographs detect infrasound waves and can be used to locate the epicenters of earthquakes.
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