Question

why echoes can't be heard in a small room?

• A. Because of multiple reflectcions in small rooms.
• B. Because time gap between direct sound and reflected sound is too low to be perceptible by human ear.
• C. Because small rooms absorb more sound.
• D. Because small rooms reflect less amount of energy.

Answer 1

The correct option is B Because time gap between direct sound and reflected sound is too low to be perceptible by human ear.

There should be minimum gap of 0.1 second between direct sound and reflected sound to be perceptible by human ear. In small rooms the reflected sound comes back before 0.1 second, so we are not able to hear echoes in small rooms.