2010 CNG Hybrid-SOM236

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Exterior Noise Test

Accelerating from Standstill

Date : 2010-11-09
Personnel : B.G., T.S. & S.C.
Temperature (°F) : 56 Humidity (%) : 60
Wind Speed (mph) : Wind Direction :
Barometric Pressure (in.Hg) : 30.12
Verify that microphone height is 4 feet, wind speed is less than 12 mpg and ambient temperature is between 30 F and 90 F: true checked by S.C
Initial Sound Level Meter Calibration: true checked by S.C.
Exterior Ambient Noise Level dB(A): 36.9

Accelerating from Constant Speed
Curb (Right) Side
Accelerating from Constant Speed
Street (Left) Side
Run # Measured Noise Level dB(A) Run # Measured Noise Level dB(A)
1 72.6 1 70.8
2 70.5 2 70.9
3 71.3 3 71.0
4 71.2 4 71.7
5 71.1 5 71.0
Average of two highest actual noise levels = 71.9 dB(A) Average of two highest actual noise levels = 71.4 dB(A)