Realization of ground effects on snowmobile pass-by noise testing
Department of Mechanical Engineering-Engineering Mechanics
Noise concerns regarding snowmobiles have increased in the recent past. Current standards, such as SAE J192 are used as guidelines for government agencies and manufacturers to regulate noise emissions for all manufactured snowmobiles. Unfortunately, the test standards available today produce results with variability that is much higher than desired. The most significant contributor to the variation in noise measurements is the test surface. The test surfaces can either be snow or grass and affects the measurement in two very distinct ways: sound propagation from the source to the receiver and the operational behavior of the snowmobile. Data is presented for a known sound pressure speaker source and different snowmobiles on various test days and test surfaces. Relationships are shown between the behavior of the sound propagation and track interaction to the ground with the pass-by noise measurements.
SAE International Journal of Commercial Vehicles
Realization of ground effects on snowmobile pass-by noise testing.
SAE International Journal of Commercial Vehicles,
Retrieved from: https://digitalcommons.mtu.edu/michigantech-p/2937
© 2009 SAE International. Publisher’s version of record: https://doi.org/10.4271/2009-01-2229