What are ultrasonics? Can you hear the ultrasonic sound?
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Sounds of frequencies higher than 20,000 Hz are called ultrasonic sounds. We cannot hear ultrasonic sound.
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Define the following terms:
(a) Amplitude
(b) Frequency
(c) Time period
Write the audible range of frequency for the normal human ear.
What are infrasonics? Can you hear them?
How does a bat make use of ultrasonic waves to find its way?