Aero Elite Ford 550 Super Duty Chassis-Diesel Engine

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Exterior Noise Test

Accelerating from Constant Speed

Date : 2011-11-07
Personnel : G.C., T.S., B.L. & S.C.
Temperature (°F) : 63 Humidity (%) : 41
Wind Speed (mph) : 7 Wind Direction : SW
Barometric Pressure (in.Hg) : 30.28
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): 45.8

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 71.3 1 70.3
2 72.0 2 71.6
3 72.0 3 72.1
4 72.6 4 72.0
5 73.5 5 73.0
Average of two highest actual noise levels = 73.1 dB(A) Average of two highest actual noise levels = 72.6 dB(A)