Question

What is an echo?

• A. Reflected sound reaching to the listener some time after direct sound.
• B. Reflected sound reaching to the listener some time before direct sound.
• C. Reflected sound reaching to the listener with direct sound.
• D. Reflected sound that does not return to the speaker.

Answer 1

The correct option is A

Reflected sound reaching to the listener some time after direct sound.

When we shout in front of any obstacle (cliff, wall etc.) the sound reflects from the obstacle and comes back. So we hear the sound twice, one is direct sound and the second one is the reflected sound. This reflected sound is called as an echo.