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Sound Quality Jury Analysis versus Sound Pressure Measurement in Snowmobiles
ISSN: 0148-7191, e-ISSN: 2688-3627
Published May 19, 2009 by SAE International in United States
Annotation ability available
Restrictions on noise and gaseous emissions of snowmobiles have been a topic of much attention for the past decade. Concerns with snowmobiles in our national parks and with private land owners have resulted in new park legislations as well as legal disputes regarding recreational vehicle rights-of-way. The most widely used standard for snowmobile testing is SAE J192 Exterior Sound Level for Snowmobiles, SAE Recommended Practice. This is a wide-open throttle test with sound level meters 50 feet on either side of the snowmobile. The sound pressure cannot exceed a certain level for the snowmobile to pass. Perceived noise also plays an important role in the objections to snowmobiles. This paper considers the role of Sound Quality methods, specifically Jury Analysis, in understanding the difference between objective noise analysis and subjective noise preferences; also considering the underlying snowmobile attributes that control snowmobile noise. Both objective and subjective data taken at the SAE Clean Snowmobile Challenges will be used as the basis of the analysis. Conclusions show that there are measurable quantities related to annoyance that correlate with subjective noise preference.
CitationMeldrum, J. and Knittel, J., "Sound Quality Jury Analysis versus Sound Pressure Measurement in Snowmobiles," SAE Technical Paper 2009-01-2231, 2009, https://doi.org/10.4271/2009-01-2231.
- SAE CSC 2008 Rules
- SAE J192, Exterior Sound Level for Snowmobiles
- SottekR., GenuitK., Models of Signal Processing in Human Hearing, ELSEVIER, International Journal AEÜ of Electronics And Communications, 59 (2005) 157-165
- GenuitKlaus; A New Approach to Objective Determination of Noise Quality Based on Relative Parameters (Proc. InterNoise 1996, Liverpool, U. K.)
- ISO532B for stationary sounds and DIN456311A1 for non-stationary sounds (the DIN standard was used for this calculation)
- Complete description of all of the snowmobiles in the competition can be found at Michigan Tech Keweenaw Research Center web site: http://www.mtukrc.org/csc2008_download.htm
- GenuitK, Objective Evaluation of Acoustic-Quality Based on a Relative Approach, Inter-Noise ’96, Liverpool, England, Conference Proceedings (Book 6, pp. 3233-3238)
- SellerbeckP., NettelbeckC., HeinrichsR and AbelsT, Improving Diesel Sound Quality on Engine Level and Vehicle Level - a Holistic Approach, SAE Noise and Vibration Conference 2007 # 2007-01-2372
- Sound files in. wav format can be accessed on the web site in reference 1.
- Communication with Donald Elzinga 11/11/08
- Email from Donald Elzinga 10/21/08
- id reference 2
- Email from Andrew Findlay of Bombardier Recreational Products 10/14/2008
- Email from Donald Elzinga of General Motors 10/14/08