Noise, vibration, harshness (NVH)
The sonorous hum inside a limousine. The powerful sound of a premium sports car starting up. What makes us perceive a vehicle as luxurious? Consciously or unconsciously, sound plays an important role. The control of airborne and structure-borne noise – known in technical language as noise, vibration, harshness – is therefore an essential aspect in the premium segment of automotive engineering.
Physically and mathematically, the metrological investigation of vibration phenomena is very complex. It is therefore rightly called the “supreme discipline of measurement technology”. In theoretical analysis, Fourier transformations and order analyses are part of daily business in the search for resonance areas. In practical testing, sampling rates in the kHz range with up to 150 measurement channels recorded in parallel place high demands on the mastery of special measurement technology. This ensures that engine vibrations which are perceived as disturbing can be damped or eliminated as far as possible in all driving situations.
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