He could tell by her voice, muffled as it was.
His voice was muffled, but so were all sounds just now.
Her voice was muffled, but the sense of it reached him clearly.
Everyone seemed to be talking at once, but their voices were muffled.
"I do not feel at all well," she announced in a voice muffled by her hand.
His voice was muffled against her, but he wasn't crying.
He heard something in reply but could not understand, for her voice was muffled.
Porter's voice was muffled by the wall and his own blood.
His voice was muffled, as if he were speaking over the telephone.
Her voice became deep and muffled, but there was still no gesture.