G4500

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Exterior Noise Test

Accelerating from Constant Speed

Date : 2009-08-24
Personnel : B.S., T.S. & S.C.
Temperature (°F) : 71 Humidity (%) : 64
Wind Speed (mph) : 5 Wind Direction : SW
Barometric Pressure (in.Hg) : 30.2
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): 37.5

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 72.4 1 70.6
2 72.7 2 70.6
3 72.3 3 71.9
4 72.8 4 72.3
5 72.8 5 72.4
Average of two highest actual noise levels = 72.8 dB(A) Average of two highest actual noise levels = 72.4 dB(A)