D-35

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Exterior Noise Test

Accelerating from Standstill

Date : 1990-12-19
Personnel : S.M. & B.L.
Temperature (°F) : 46 Humidity (%) : 80
Wind Speed (mph) : 7 Wind Direction : NNW
Barometric Pressure (in.Hg) : 30.07
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.M.
Initial Sound Level Meter Calibration: true checked by S.M.
Exterior Ambient Noise Level dB(A): 53.5

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 75.6 1 75.3
2 75.7 2 76.9
3 74.4 3 78.7
4 74.7 4 79.3
5 5
Average of two highest actual noise levels = 75.7 dB(A) Average of two highest actual noise levels = 79.0 dB(A)