Today consumers have a higher level of expectations when it comes to the products they purchase. Performance and reliability have always been important, but now consumers expect sleeker-looking designs and in the case of appliances and equipment, they expect quieter operation. To answer this demand, the designers and developers of products, from automobiles to appliances, are relying on fabricated adhesive materials to produce quieter designs.
When it comes to noise associated with product designs, the primary sources of noise are airborne noise and structural noise. Airborne noise is created by the interaction of a vibrating surface with the surrounding air. It can be reduced by adding absorbers, barriers, and layers to absorb or reflect sound energy. Structural noise is produced by mechanical vibration energy that travels throughout the structure of a product as well as materials with which it comes in contact. Structural noise can be controlled by controlling the vibration that causes it. A low friction surface positioned between parts is one way to manage vibration. Isolation of the vibration is another. A final way to manage structural noise is to change the vibration mode of the structure by adding a vibration dissipating dampening material.