Following are some of the methods to reduce the reverberation in a big hall or auditorium:-
1) Sound absorbing materials should be used to make panels for the walls of the hall.
2) To absorbe sound and reduce the reverberation carpets are used on the flor.
3) To absorve sound heavy curtains should be used on the doors and windows.
4) Materials with sound absorving properties should be used for making seats.
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