Question

why are the roofs and walls of an auditorium/hall generally covered with sound absorbent materials

Answer 1

The roofs and walls of an auditorium / hall is generally covered with sound absorbent materials so as to prevent it from the outer noise and sound and also to prevent from damaging of walls

Answer 2

The roofs and walls of an auditorium / hall is generally covered with sound absorbent materials so as to prevent it from the outer noise and sound and also to prevent from damaging of walls