Question

what is reverberation. Why the walls of auditorium roof curved and high?

Answer 1

A reverberation, or reverb, is created when a sound or signal is reflected causing a large number of reflections to build up and then decay as the sound is absorbed by the surfaces of objects in the space – which could include furniture, people, and air.

Answer 2

In a big hall, where there a musical concerts/dance shows etc, there will be repeated reflections from walls all round. The sound will persist for a very long time due to this multiple reflections. The repeated reflection that results in this persistence of sound is called reverberation.

In a big hall, reverberation is required so that the entire hall can hear the sound. At the same time, if the reverberation is very high, the sound will persist for too long even if the source of sound has actually stopped. So, this is undesirable. The reverberation effect should be controlled. Several acoustic techniques are deployed to do this.