Why is the Vehicle Interior Noise of Interest?
Measuring the interior noise of a vehicle is a critical aspect of NVH (Noise, Vibration and Harshness) analysis in cars, as it directly affects the quality and comfort of the driving experience. To measure a vehicle's interior noise, microphones are strategically placed inside the vehicle to capture sound waves and record them as NVH levels. Typically, these measurements are taken during real-time driving scenarios to capture a realistic noise environment. Analyzing and evaluating the collected data is instrumental in optimizing the vehicle's noise performance and ultimately improving the overall driving experience.
How is the Interior Noise of the Vehicle Measured?
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.
Electric Motor vs. Combustion Engine?
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.
