Aero Elite Ford F-550 CNG

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Exterior Noise Test

Accelerating from Constant Speed

Date : 2012-09-28
Personnel : B.L., S.R. & M.Z.
Temperature (°F) : 64 Humidity (%) : 56
Wind Speed (mph) : 8 Wind Direction : WSW
Barometric Pressure (in.Hg) : 30.05
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 B.L.
Initial Sound Level Meter Calibration: true checked by B.L.
Exterior Ambient Noise Level dB(A): 36.3

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 75.7 1 74.9
2 75.7 2 76.2
3 76.4 3 75.6
4 76.4 4 75.2
5 76.5 5 74.7
Average of two highest actual noise levels = 76.5 dB(A) Average of two highest actual noise levels = 75.9 dB(A)