Constrained-layer damping
Introduction CLD Gypsum Panel'''Constrained-layer damping''' is a mechanical engineering technique to suppress vibrations. Typically a viscoelastic or other damping material, is sandwiched between two sheets of stiff materials that lack sufficient damping by themselves. The end result is that any vibration generated on either side of the constraining materials (the two stiffer materials on the sides)  is suppressed by the viscoelastic material, by turning it into heat.
References *
External links *  Passive Viscoelastic Constrained Layer Damping Application for a Small Aircraft Landing Gear System An engineering Master's thesis