Mention how ultrasonic wave different from the normal way
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Ultrasonic Sound
- frequency of ultrasonic sound is more than 20,000 Hz
- this sound is not audible to human ears
- this sound is used by bats to navigate themselves in dark, also now various technology developed like SONAR, Sonography, etc
Audible Sound
- frequency of audible sound is between 20 Hz to 20,000 Hz
- this sound is audible to human ears
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