What is reverberation? How can it be reduced?

(N/A) Reverberation is the persistence of sound in an enclosed space due to repeated reflections from the walls,ceiling,and floor after the original source of sound has stopped.
Reverberation can be reduced by using sound-absorbing materials on the walls and ceilings of the room to minimize reflections.
Common materials used to reduce reverberation include fibreboard,heavy curtains,carpets,and acoustic foam.