How to use "muffled" in a sentence

It must have been a large object because, though muffled by the intervening walls, the sound was loud enough to rouse her.

The place was relatively quiet, except for the muffled oceanic roar of the VIP crowd that waited in the main showroom, beyond the velvet curtains.

Though Danny's screams were increasingly muffled, they were even more urgent than before, because the dirt began to cover his face and pour into his mouth