NVH, which stands for Noise, Vibration, and Harshness, is the study of the noise and modification vibration characteristics of vehicles and is basically a measure of how much unpleasant aural and tactile feedback the vehicles deliver as you drive. NVH testing enables early recognition of NVH phenomena, which can then be avoided early during the development stage of the powertrain. This later makes driving in the production vehicle more comfortable and serves to avoid complaints and a loss of image.