Question

what is reverberation and how it can be reduced

Answer 1

reverberation is the repeated multiple reflections of sound in any big enclosed space . It can be reduced by covering the ceiling walls of the enclosed space with some absorbing materials like fibre boards , loose wollens ,etc......

Answer 2

The repeated multiple reflections of sound in any big enclosed space is known as reverberation.

The reverberation can be reduced by covering the ceiling and walls of the enclosed space with sound absorbing materials, such as fiber board, loose woolens, acoustic tiles , thick curtains  etc.