In the past several years, there has been increased market place awareness of noise, vibration, and harshness performance in vehicles. We can refer to the NVH, Noise Vibration Harshness, as the study and modification of the noise and vibration characteristics of vehicles. Nowadays manufacturers give a lot of importance to NVH in order to achieve higher level of satisfaction with respect to competitors since quality and reliability standards are set by the market. For example, all-terrain vehicle industry invests resources on development of new materials and damping techniques in order to upgrade comfort and driving performances. Carpeting treatments, the addition of rubber to vehicle panels, gap sealant, and the injection of expandable foam into body panels are some of the methods used to reduce noise and vibrations.