This content is not included in your SAE MOBILUS subscription, or you are not logged in.
In-Cabin Aeroacoustics of a Full-Scale Transport Truck
ISSN: 0148-7191, e-ISSN: 2688-3627
Published September 27, 2016 by SAE International in United States
Annotation ability available
The noise generated by the flow of air past a transport truck is a key design factor for the manufacturers of these vehicles as the sound levels in the cabin are a significant component of driver comfort. This paper describes a collaboration between Volvo GTT and the National Research Council Canada to measure the in-cabin aeroacoustics of a full-scale cab-over tractor in the NRC 9 m Wind Tunnel. Acoustic instrumentation was installed inside the tractor to record cabin noise levels and externally to acquire tunnel background noise data. Using a microphone mounted on the driver’s-side tunnel wall as a reference to remove variations in background noise levels between data points, differences in cabin noise levels were able to be detected when comparing the tractor with different configurations. The good repeatability of the data allowed for differences of as little as 0.5 dB to be measured. A procedure to estimate the transfer function from the wall reference microphone to the cabin microphones was implemented which, though of limited success, provided insights into the acoustic environment of the test section. The main conclusion of this project is that aeroacoustic measurements can be carried out in the NRC 9 m Wind Tunnel in conjunction with an aerodynamic entry for full-scale transport trucks.
CitationSyms, J., Manns, T., and Bergqvist, B., "In-Cabin Aeroacoustics of a Full-Scale Transport Truck," SAE Technical Paper 2016-01-8143, 2016, https://doi.org/10.4271/2016-01-8143.
- Ljungberg, J. “Cognitive Degradation After Exposure to Combined Noise and Whole-Body Vibration in a Simulated Vehicle Ride.” International Journal of Vehicle Noise and Vibration 3(2):130-142, 2007.
- NRC. “National Research Council Canada.” http://www.nrc-cnrc.gc.ca, accessed Jul. 2016.
- Volvo Group. “Volvo Group Trucks Technology.” http://www.volvogroup.com, accessed Jul., 2016.
- Wickern, G. and Brennberger, M., "Scaling Laws in Automotive Aeroacoustics," SAE Technical Paper 2009-01-0180, 2009, doi:10.4271/2009-01-0180.
- Mercker, E. and Pengel, K., "On the Induced Noise of Test Sections in Different Wind Tunnels and in the Cabin of a Passenger Car," SAE Technical Paper 940415, 1994, doi:10.4271/940415.
- Brüel & Kjær. “Brüel & Kjær Sound & Vibration Measurement A/S.” bksv.com, accessed Jul. 2016.
- Larose, G., Tanguay, B., Van Every, D. and Bender, T. “The New Boundary Layer Control System for NRC’s 9m x 9m Wind Tunnel.” AIAA-2001-0455, 2001.
- HEAD Acoustics. “SQuadriga Mobile Recording and Playback System.” head-acoustics.de, accessed Jul. 2016.
- Brüel & Kjær. “Sonoscout NVH Recorder.” bksv.com, accessed Jul. 2016.
- SRS. “Stanford Research Systems: Function Generator DS360.” http://www.thinksrs.com, accessed Jul. 2016.
- MathWorks. “MATLAB The Language of Technical Computing.” http://www.mathworks.com, accessed Jul. 2016.
- Bendat, J.S. and Piersol, A.G. Random Data - Analysis and Measurement Procedures. John Wiley & Sons, 1986.
- Crighton, D., Dowling, A.P., Williams, J.F., Heckl, M. et al. Modern Methods in Analytical Acoustics: Lecture Notes. Springer-Verlag Berlin Heidelberg, 1992.