Question

The persistence of hearing of human beings is not more than
A. \[1s\]
B. $1/5s$
C. $1/10s$
D. $1/2s$

Answer 1

Hint: We can solve this question only if we have any idea about the hearing ability of human beings. Persistence of hearing of a human is described as a time for which sensation of any sound remains in our brains.

Complete answer:
If the time of persistence of hearing for humans is increased or decreased in comparison to normal ear, it shows the defect in the ear or we can say the hearing loss of the human ear. In the normal process of hearing a sound wave enter the ear and reaches our eardrum. Eardrum vibrates by the wave and vibration reaches through the ossicles to the cochlea and cochlea converts these vibrations into the impulses that go forward by the auditory nerve to the brain.

The frequency range of a normal healthy person that they can hear easily extends from $20Hz$ to $20000Hz.$ While the loudness of hearing for a human being which is audible for a person extends from $0$ to $180dB$, if any sound which has more than audible range is harmful for ear.
In the jet plane planes takeoff so much noise is produced. The sensation of hearing any sound persists in our brain for $0.1\sec $. This is known as persistence of hearing.
Now, the persistence of hearing of human beings should not be more than $0.1\sec $ .

So, the correct answer is “Option C”.

Note:
Whenever such types of questions appear then as mentioned in the question, first explain the persistence of hearing and the audible range of sounds for human beings and then see which option is correct among the given options.