Megasorber® Damping materials effectively dissipate Vibration energy
Vibration damping 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 treatments.
In simple terms, vibration damping is similar to a suspension system in a car. It consists of a spring and a shock absorber.
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 are like the suspension system without the shock absorber. By adding weight to the system, it makes it harder to initiate
the vibration. However, vibration energy remains in the system
Megasorber damping materials are engineered to be the "shock absorber" of the suspension system and remove the vibration energy from the system
Material deformation: extension & compression
Free-Layer Vibration Damping Products
The damping material must have high internal loss factor, and it can not be too soft nor too rigid. It is a challenge to balance the requirements
of high loss factor and the modulus of the material. The following materials have been designed to have both optimized modulus and a high
The damping material must be extremely viscous and soft. The loss factor of the material could be as high as 1.0. The following products all
have a unique damping layer which is self-adhesive with high loss factor up to 1.0 :
Hear how Megasorber damping materials effectively reduce impact vibration noise:
Megasorber DT2S on 5mm Steel Plate (Impact Noise Reduction)
Megasorber DT2A on 12mm Aluminum plate (Impact Noise Reduction)
How is the performance of damping materials rated?
(1) System loss factor: is the total loss factor of a substrate after the damping treatment. It is measured as per ASTM E756-98: Standard Test Method for Measuring Vibration-Damping Properties of Materials.
(2) Decay rate (dB per second): is how fast the vibration decays. It is measured as per AS1937.10-1977: Determination of Damping Coefficient by The Thick Plate Method.
How is System Loss Factor related to the total noise reduction in dB(A)?
A system loss factor of 0.1 is equivalent to a noise reduction of 20 dB(A) for a large and freely suspended panel.
With Megasorber system loss factor calculation program, we ensure that the system loss factor is 0.10 as a minimum for a damping treatment
on various substrates such as steel, aluminium, plastic and so on.
What is the typical noise reduction in dB(A) after the damping treatment?
Typical noise reduction is between 8dB(A) to 15 dB(A) depending on the applications.
Is it possible to achieve high sound transmission loss as well as high vibration dampening?
This can be achieved with (1) specially formulated damping material with high loss factor and mass and (2) 100% coverage of the substrate.
Megasorber D10 and D20 products are specifically formulated to provide high vibration damping as well as high sound transmission loss.