I do believe that at worst for some people being faced with silence, with themselves and nothing more, would be like hell.

“Do not speak unless you can improve the silence”
(source unknown)

"I have discovered that all human evil comes from this: man's being unable to sit still in a room." Blaise Pascal

I remember seeing an old twilight zone episode where a man time travels from the old west to the present and the noise absolutely drives him insane.

Silence is also called trust..

shhh...