Aero Elite Ford (F550 Superduty Chassis)

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Exterior Noise Test

Accelerating from Standstill

Date : 2011-06-22
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): 43.6

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 68.7 1 71.1
2 70.9 2 71.9
3 71.0 3 72.3
4 70.9 4 69.9
5 71.7 5 72.1
Average of two highest actual noise levels = 71.4 dB(A) Average of two highest actual noise levels = 72.2 dB(A)