CNG 45' Coach

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Exterior Noise Test

Accelerating from Standstill

Date : 2012-12-12
Personnel : T.S. M.Z. & S.R.
Temperature (°F) : 36 Humidity (%) : 52
Wind Speed (mph) : 5 Wind Direction : W
Barometric Pressure (in.Hg) : 30.37
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 T.S.
Initial Sound Level Meter Calibration: true checked by T.S.
Exterior Ambient Noise Level dB(A): 33.9

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 69.1 1 69.5
2 67.3 2 68.4
3 67.7 3 69.1
4 67.2 4 68.2
5 67.6 5 68.9
Average of two highest actual noise levels = 68.4 dB(A) Average of two highest actual noise levels = 69.3 dB(A)