NVH Noise, Vibration and Harshness NVH Noise, vibration and harshness, also known as noise and vibration, abbreviated to NVH and N&V respectively, is the name given to the field of measuring and modifying the noise and vibration characteristics of vehicles, particularly cars and trucks. Noise: Noise is defined as any unpleasant or unexpected sound created by a vibrating object. Vibration: Vibration is defined as any…