Is it true that the sensation of hearing any sound persists in our brain for $0.2 s$ ?

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True

False

answer is B.

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Detailed Solution

The above statement is False.
The sensation of hearing any sound persists in our brains for

0.1 s

. For around

0.1 s

, the sense of every sound remains in our ears. This is known as "hearing persistence." If the echo is heard during this time span, it is difficult to differentiate between the original sound and its echo. So, the most important condition for hearing an echo is that only after a lapse of at least

0.1 s

after the original sound dies off should the reflected sound reach the ear.
The correct statement would be the sensation of hearing any sound persisting in our brain for