Aero Elite Ford (F550 Superduty Chassis)

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Exterior Noise Test

Accelerating from Constant Speed

Date : 2011-03-22
Personnel : G.C., T.S. & S.C.
Temperature (°F) : 80 Humidity (%) : 68
Wind Speed (mph) : 7 Wind Direction : SSW
Barometric Pressure (in.Hg) : 29.89
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): 44.3

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 70.3 1 70.9
2 68.8 2 68.6
3 71.4 3 71.3
4 71.7 4 71.6
5 71.3 5 72.3
Average of two highest actual noise levels = 71.6 dB(A) Average of two highest actual noise levels = 71.9 dB(A)