Material deformation: extension & compression
Material deformation: shear
Vibration damping treatment is one of the most cost effective ways to reduce low frequency structure-borne noise.
Free-layer and constrained-layer are the two most frequently used damping mechanisms. Conventional damping materials are usually very heavy and are applied to the substrate as a free-layer. These materials are frequently referred to as 'mass-dampers'. These mass-dampers shift the frequency to either lower or higher range, rather than dissipate the vibration energy. In other words, they just 'pass the buck' and don't do the job of absorbing sound.
Megasorber® damping materials are engineered to provide the maximum energy absorption. For example, Megasorber LD5 liquid deadener is almost as light as water and yet it will absorb about 8 to 10dB(A) of metal roof impact noise.
Megasorber D14 vibration damping sheet takes this a step further. It is one of the most advanced constrained-layer damping materials that we have ever developed. It is thin and light-weight yet highly effective. D14 is widely used in weight-sensitive applications such as cars, trains, buses and boats. There are two unique properties of this material: