Question

what is reverberation how can it be reduce​

Answer 1

Reverberation is the repetition of the sound in a closed area for eg. Concert halls, cinema halls, etc.
we can reduce it by following ways:-
1. By using curtains
2. By using sound absorbing materials on walls
3. By using the fibres on chairs
4. By using rough plasters on walls.
All these factors will help in reducing the reverberation

Answer 2

#Due to repeated reflection of sound waves, after sometime the source of the sound stops producing sound, this phenomena is called as reverberation.
#  Consider, a source produces sound which gets scattered in all directions in a closed room. As a result, the wave reaches the wall and simultaneously gets reflected and reaches to other wall of the room and so on. Under these circumstances, repeated reflection of sound causes source to stop the producing sound.
#Reverberation can be reduced if we can place some sound absorbing materials inside the room like curtains, plastic fireboard etc.