Question

what is meant by reverberation ?

Answer 1

the repeated reflection that results in persistence of sound is called REVERBERATION

Answer 2

When a sound is made in a big hall or auditorium, the sound waves suffer multiple reflections from the walls, ceilings and other materials found in the hall. Due to this, the sound persists for some time even after the source has stopped producing sound. This persistence of sound due to repeated reflection is known as Reveberation.