NVH materials (Noise, Vibration, and Harness Materials) are specifically used to reduce noise and vibration of vehicles. These materials are widely used in the automotive industry; within the interiors and on the exterior of the vehicle to reduce the noise and vibrations. Wind, brakes, tires, driveline, and engine are some of the key sources of noise. Vibrations are generally experienced at doors, floor, pedals, armrests, seats, and the steering vehicle. Automotive NVH materials are acoustic devices classified as sound damping materials, sound barrier materials, and sound absorbing materials.

Sound attenuating properties of sound absorbing NVH Materials are determined by the specific sound absorbing coefficient. These materials are heavy and non-porous, and used to barrier the transition. While, sound damping NVH materials are used to reduce structural vibrations in the resonant structure to which these materials are attached. With the increasing production and sales of automotive vehicles and government initiative to make safer and quieter vehicles, the demand for such materials form automotive manufacturers, to reduce the noise and vibration to provide comfort to users, is also increasing.

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