The sound was muffled by the door but not nearly enough.

The sound, as you would expect, is muffled at times.

He fell on her, and the sounds of his fall were muffled.

The sound was muffled, as though absorbed by the very air itself.

Inside the cars the sound of the storm had been muffled.

The sound was muffled, almost like an explosion but not quite.

The sound of work in progress was muffled by the closed bedroom door.

Then the sound of the music was muffled by the closing doors.

The sound was muffled, but clear, not choked or as if he were in pain.

He'd heard the shot: the sound was muffled, but there wasn't any doubt.