Bosch Engineering puts new acoustics test center into operation
Complete acoustics engineering development
Acoustics are a major issue in automotive engineering. Firstly, government regulations for vehicle registration set out limits for external noise levels. Secondly, car buyers and owners expect less vibration and noise and a smoother, quieter ride. New electric and hybrid drives also present considerable and often very specific challenges for acoustics experts seeking to improve NVH. This is why acoustics is an increasingly important factor in automotive engineering. It has to be included early on in the development process, when new models are still on the drawing board. Bosch Engineering supports automakers’ efforts to improve NVH with a holistic engineering approach focused on optimizing the vehicle. “In acoustics analysis, we take advantage of the synergies resulting from the close collaboration within Bosch Engineering and with the Bosch Group’s acoustical engineers,” says Jörg Vetter. The company offers customers a comprehensive service package spanning the entire product development chain for a new vehicle. Providing advice in the design phase and support in the development phase, it also helps customers to continue improving their vehicles’ NVH behavior.
Putting vehicle acoustics to the test
Engineers often test-drive cars on public roads or private test tracks to investigate their acoustics. The problem with open-road tests is that external factors such as ambient noise, weather conditions or the driver’s profile may skew the measured results. This is why test series are often long and tedious, with results that are hardly reproducible. Bosch Engineering has created an ideal environment for assessing vehicles’ NVH performance in its state-of-the-art acoustics test center in Abstatt. With a soundproof hemi-anechoic chamber isolated from the outside world, it provides a far more efficient means of testing and comparing new or modified components and calibrations under uniform conditions and with a view to their impact on the overall vehicle. This reduces the cost and time involved in engineering new cars’ acoustics and optimizing legacy vehicles’ acoustics. “In our test center, we can quickly detect noise sources that impair driving comfort and develop countermeasures together with our customers,” notes Jörg Vetter. Tailor-made and reproducible, the development center’s measurement, analysis and evaluation procedures serve to rapidly assess and optimize acoustical phenomena.
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