what is ultra sonics can you hear the ultrasonic sound
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THE RANGE OF SOUND ABOVE 20,000 HERTZ IS KNOWN AS ULTRASONIC
IT IS INAUDIBLE TO HUMAN EAR AS THE AUDIBLE RANGE OF FREQUENCY OF HUMAN EAR IS 20 HERTZ TO 20,000 HERTZ.
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ultrasonic are those sound waves which have frequency above 20,000 Hertz. We can't hear them because they are above the human hearing level.
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