It is well known that noise is emitted from a resonating structure, such as the noise resulting from the striking of a cymbal. The amount of this noise can be drastically reduced by the application of a layer of a vibration sound damping compound to the surface of the resonating structure.

The sound damping compound causes the vibrational energy to be converted to into heat. If this is accomplished, the need to absorb and attenuate airborne noise with sound absorption and sound blocking materials is reduced. Vibration sound damping is also used to improve the sound quality of a product.

The reduction of resonant vibrations leads to a decrease in tinniness for items made from a light gauge sheet metal. Not only does the application of a sound damping compound reduce the noise resulting from the vibration of the structure, it also leads to an increase in sound transmission loss.

Sheet metal is frequently not as good a material for the insulation of airborne noise as one might expect based on its weight, because undamped resonances reduce the structure’s sound transmission loss. By increasing the damping of the sheet metal, the sound transmission loss is increased to near the theoretical figure. Vibration sound damping compounds are frequently applied to such structures as air conditioning units, pelletizers, grinders, hoppers, portable air compressors, boats, trucks, kitchen sinks, garbage chutes, appliance cabinets, subway cars, refrigeration units, speakers for sound systems, industrial equipment enclosures and many types of machinery which fabricate objects from metal to plastics

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