If we felt a boom of sound in empty rooms.
a) Which are the regions where sound waves in a room get reflected?
b) Do these repeatedly reflected sound waves reach the ear of a listener simultaneously?
c) Will you be able to hear all these sounds clearly due to the persistence of audibility? Wont you be hearing only a boom of all the sound?

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a) The sound waves get reflected form the walls, ceilings, floor etc.
b) No
c) We will not be able to hear all these sounds clearly, due to the persistence of audibility. We will be able to hear only a boom of all the sounds. This is as a result of reverberation.

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