D-35

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Exterior Noise Test

Accelerating from Constant Speed

Date : 1990-12-19
Personnel : S.M. & B.L.
Temperature (°F) : 46 Humidity (%) : 81
Wind Speed (mph) : 8 Wind Direction : NW
Barometric Pressure (in.Hg) : 30.05
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: false checked by S.M.
Exterior Ambient Noise Level dB(A): 54.2

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 74.3 1 80.2
2 73.6 2 79.1
3 73.6 3 79.3
4 73.4 4 78.9
5 5 78.7
Average of two highest actual noise levels = 73.9 dB(A) Average of two highest actual noise levels = 79.8 dB(A)