Difference between echo and reverberation


If the reflected sound is heated separately from an original sound, then the reflected sound is called an echo of the original sound.


It is often noted that when a loud sound is produced near the walls of a big hall, it returns after being reflected very quickly (time interval is less than 1/10 s) when the effect of the original sound still persists. On account of successive reflections from the walls, a continuous rolling of sound goes on for some time. This persistence of sound due to multiple reflections from the walls is called reverberation.