Madhya Pradesh Police Exam Model Paper 2

The correct answer is option 4, i.e., 22000 Hz .

• A frequency of 22000n Hz is not audible to human beings .
• The frequency range of sound that a normal human adult can detect is from 20 Hz to 20000 Hz.
• The human infants can hear frequencies slightly higher than 20 kHz.
• Most small mammals have the capability of hearing higher frequencies but are however insensitive to lower frequencies.
• For eg. : In some species of bats, the frequency range of sound is 20 kHz to 200kHz.
• The frequencies above the audible range for humans, i.e., above 20 kHz, are termed as ultrasonic .
• The frequencies below the audible range for humans, i.e., below 20 Hz, are termed as infrasonic .
• Ultrasonic and infrasonic frequencies of sound are inaudible to humans.
• 22000 Hz comes under ultrasonic range , hence it is inaudible to human beings.