Question

What should be the minimum time interval between the original sound and the reflected sound to hear a distinct echo?

• A. 0.1 seconds
• B. 0.3 seconds
• C. 0.2 seconds
• D. 0.4 seconds

Answer 1

The correct option is A 0.1 seconds

The sensation of sound persists in our ear for about 0.1 seconds. To hear a distinct echo, the time interval between the original and reflected sound must be greater than or equal to 0.1 seconds.