GK
UNITS DEVICES DIMENSIONS AND MEASUREMENTS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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What are audible sound waves?
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Having frequency less than 20 Hz
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Having frequency more than 20000 Hz
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Having frequency between 20 Hz to 20000 Hz
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None of above
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Explanation:
Detailed explanation-1: -The audible frequency range for human ear is from 20Hz to 20000Hz, waves having frequency above 20000Hz, are called ultrasonic and below 20Hz, they are called infrasonic .
Detailed explanation-2: -Sound waves whose frequency is greater than 20000 Hz is called ultrasonic sound.
Detailed explanation-3: -As a result, audible sound is defined as sound waves having a frequency between 20 Hz and 20 kHz. If they are in the audible frequency range, every tiny fluctuation in air pressure may be detected by the human ear. Less than one billionth of an atmospheric pressure change can be detected.
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