Damping (or Dampening)
The ability of a material to reduce vibrations. On a driver, a cone coating or surround material can minimize vibrations within the cone, yielding flatter frequency response. Overall movement of the cone can be damped electrically or mechanically through the voice coil and suspension. In speaker cabinets, damping materials can reduce wall vibrations when applied directly to the walls, or can absorb acoustic energy from within the enclosure itself.