what are infrasound and ultrasound?
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infrasound - sound waves with frequencies below the lower limit of human audibility.
ultrasound- sound or other vibrations having an ultrasonic frequency, particularly as used in medical imaging.
ultrasound- sound or other vibrations having an ultrasonic frequency, particularly as used in medical imaging.
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the sound which is above 20000hz is called ultrasound and sound which is below 20hz is called infrasound
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