Question

Sound absorbing materials.
are
kept in
the walls of cinema hall. Why?​

Answer 1

The roof and walls of the auditorium or cinema hall are generally covered with sound absorbent materials like draperies or compressed fibreboard to reduce reverberation. These materials reduce the formation of echoes by absorbing sound waves.

Hope it's help u

Answer 2

Answer:

The walls of the auditorium or cinema hall are covered with sound absorbent materials like draperies or compressed fibreboard to reduce reverberation. These materials reduce the formation of echoes by absorbing sound waves.