Meaning of DAMPER in English
noun that which damps or checks; as: (a) a valve or movable plate in the flue or other part of a stove, furnace, ·etc., used to check or regulate the draught of air. (b) a contrivance, as in a pianoforte, to deaden vibrations; or, as in other pieces of mechanism, to check some action at a particular time.
Webster English vocab. Английский словарь Webster. 2012