Damper

A damper is a device that deadens, restrains, or depresses. It may refer to:

Music

Damper pedal, a device that mutes musical tones, particularly in stringed instruments
A mute for various brass instruments

Damper (flow), a mechanical device in a duct or chimney that regulates airflow
Stockbridge damper, used to suppress wind-induced vibrations on taut cables
Tuned mass damper, a device mounted in structures to prevent discomfort, damage or structural failure by vibration

Damper (food), a bread of the Australian Outback
In mechanical engineering, a damper is a device for suppressing vibrations in a mechanical system by dissipating energy.
Dashpot, a type of hydraulic or mechanical damper
Shock absorber (British or technical use: damper), a mechanical device designed to dissipate kinetic energy
An item of boiler technology used to regulate the fire
In electronics, a kind of diode intended to absorb energy peaks, normally generated by inductive circuitry