FEV NVH experts perform detailed measurements of noise, vibration and harshness (NVH) performance and analyze key characteristics. Using a comprehensive set of instrumentation, including an artificial head, microphones and accelerometers, we measure airborne noise and structure-borne transfer functions. Experienced engineering colleagues perform a subjective assessment against defined NVH criteria. Exterior noise is measured on a certified noise test track in accordance with the official UN-ECE R138e standard.