muffling
 消聲


 Muf·fle, v. t. [imp. & p. p. Muffled p. pr. & vb. n. Muffling ]
 1. To wrap up in something that conceals or protects; to wrap, as the face and neck, in thick and disguising folds; hence, to conceal or cover the face of; to envelop; to inclose; -- often with up.
    The face lies muffled up within the garment.   --Addison.
    He muffled with a cloud his mournful eyes.   --Dryden.
    Muffled up in darkness and superstition.   --Arbuthnot.
 2. To prevent seeing, or hearing, or speaking, by wraps bound about the head; to blindfold; to deafen.
 3. To wrap or fit with something that dulls or deadens the sound of; as, to muffle the strings of a drum, or that part of an oar which rests in the rowlock; to muffle the exhaust of a motor vehicle.