GK
PHYSICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Infrasonic device
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Ultrasonic device
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Infrared device
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Ultraviolet device
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Detailed explanation-1: -Sound waves with frequencies of between 20 Hz and 20 KHz are considered to be audible vibrations.
Detailed explanation-2: -Audible sounds. Sound waves above 20, 000 Hz are ultrasonics. Sound waves below the frequency of 20Hz are infrasonics. Both are inaudible sounds for humans. Sound waves between 20Hz to 20, 000Hz are audible sounds.
Detailed explanation-3: -The humans can easily detect the frequencies ranging between 20 Hz to 20 kHz. Hence the sounds with in this range are known as audible sound. Sounds with frequencies below 20 Hz are called as infrasonic and the sound with frequencies above 20 kHz are called as ultrasonic sound.
Detailed explanation-4: -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-5: -The sound waves with a frequency greater than 20 KHz are known as ultrasound (or ultrasonic).