The reduction of wind noise of vehicle is desirable, particularly in the premium vehicle sector, where customers are sensitive to the levels of background noise in the cabin, leading to discomfort and a reduction in the perceived quality of the vehicle. It is therefore important that any wind noise issues are identified and resolved as early as possible in the vehicle development process. When running aero-acoustic wind tunnel measurements, it is important to get as much information as possible from each test, since facility time is generally expensive. Typical sound pressure measurements using binaural heads at each passenger seat position allow a good comparison of the subjective noise level between different vehicle configurations, but they do not provide direct insight to the source of the measured sound and therefore where to focus vehicle development. A spherical beamforming array is a useful tool for localizing sound sources in the vehicle. With a short measurement time, the tool allows the localization of the key acoustic sources for different frequencies. Different geometry configurations can be tested to direct the test engineers to the best configuration, thus improving the efficiency of measurements. This paper shows the results from wind tunnel measurements with the spherical beamforming array for an SUV and convertible sports car. A number of geometry modifications were assessed to highlight the possible range of measurements. This will be explained in more detail and illustrated by means of examples.
The application of spherical beamforming techniques to localize aero-acoustic sound sources in the vehicle cabin
2014
11 Seiten, Bilder, 9 Quellen
Aufsatz (Konferenz)
Englisch
Combining acoustic imaging techniques to localize and identify sources
British Library Conference Proceedings | 2008
|Combining acoustic imaging techniques to localize and identify sources
SAE Technical Papers | 2008
|Acoustic beamforming enhancement of locomotive cabin speech
Tema Archiv | 2007
|