Self-adhesive panels cut noise transmission

Paul Boughton

They are available in 2000x1000mm, 2500x1250mm, 3000x1500mm sizes or, alternatively, they may be cut to size.
The thickness of the material can be specified from 0.5mm up to 2.0mm (there being no advantage in using a greater thickness than this).
Self-adhesive acoustic dampers avoids fabrication issues that can arise when attempting to construct a component from a sheet of Sound Dead Steel. For example, folding a laminated sound deadened sheet can result in slippage between the two layers of steel, which leads to a stepped edge on returns. However, this is avoided by fabricating in the traditional way using conventional sheet metal and bonding the SDS dampers on afterwards. The acoustic benefits are not affected.
Self-adhesive acoustic dampers also avoid welding issues, as welding an acoustic laminate can be problematic due to the polymer in the laminate isolating the two layers of steel. The solution is to fabricate and weld in the traditional way, then apply the SDS damper on the flat areas, avoiding areas where welds and folds occur.
Laminates and dampers can be supplied with a high-temperature polymer or silicone powder coating, which means that dampers can be fitted prior to anodising or powder coating. SDS is currently developing a laminate that can be easily welded.
SDS dampers are an effective yet low-cost way to solve potentially expensive noise issues. It is often just a simple case of applying a self-adhesive damper to the vibrating panel and observing the results. Tests show that covering 75percent of the flat surface areas produces results similar to using a fully laminated sheet.
The fabrication can also be made out of a thinner gauge of steel, as the constrained layer damping principle does not rely on mass to reduce vibration.