Several key factors come into play when analyzing and evaluating the collected NVH data. These include the type and precise placement of microphones in the vehicle, the speed of the vehicle, the prevailing road conditions, and the ambient noise level. Adherence to standardized measurement conditions is critical to ensure accurate and comparable results.

For both internal combustion engine and electric motor vehicles, interior comfort and the ability to communicate clearly are top priorities. In particular, the quality of interior noise is often highlighted as a key criterion in customer evaluation of vehicles and is strongly influenced by all potential noise sources within the vehicle environment.

Interior noise in vehicles includes a mixture of engine and transmission noise overlaid with wind, tire, road and brake noise. The advent of electric motors brings new types of noise, such as the distinctive high-frequency noise that comes from the inverter. This noise is mainly perceptible above 5 kHz and stands out clearly from the wind and tire noise in the environment. This high-frequency noise can significantly affect the overall perception of sound quality for the listener.