AN440

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Exterior Noise Test

Accelerating from Standstill

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: true checked by Rl
Exterior Ambient Noise Level dB(A): 41.5

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 74.8 1 76.5
2 74.7 2 76.7
3 74.4 3 76.5
4 74.5 4 76.4
5 74.9 5 76.6
Average of two highest actual noise levels = 74.9 dB(A) Average of two highest actual noise levels = 76.7 dB(A)