Question

echo is due to...??????

Answer 1

Echoes work through the reflection of sound waves. When a person shouts into a well or canyon, and they hear an echo, it is because the sound waves reflect from the canyon wall or the bottom of the well and travel back to the person's ears.

Answer 2

The delay is proportional to the distance of the reflecting surface from the source and the listener. Typical examples are the echo produced by the bottom of a well, by a building, or by the walls of an enclosed room and an empty room. A true echo is a single reflection of the sound source.