AN440

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Exterior Noise Test

Accelerating from Constant Speed

Date : 1993-06-07
Personnel : BL, BR and RH
Temperature (°F) : 70 Humidity (%) : 80
Wind Speed (mph) : 4 Wind Direction : nnw
Barometric Pressure (in.Hg) : 30.06
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 RL
Initial Sound Level Meter Calibration: false checked by RL
Exterior Ambient Noise Level dB(A): 45.2

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 74.6 1 75.0
2 73.3 2 76.1
3 73.7 3 76.5
4 73.7 4 76.7
5 74.4 5 76.5
Average of two highest actual noise levels = 74.5 dB(A) Average of two highest actual noise levels = 76.6 dB(A)