AN 340

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Exterior Noise Test

Accelerating from Standstill

Date : 1993-04-14
Personnel : B.L., S.C., & R.H.
Temperature (°F) : 54 Humidity (%) : 70
Wind Speed (mph) : 4 Wind Direction : SE
Barometric Pressure (in.Hg) : 29.98
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 B.L.
Initial Sound Level Meter Calibration: true checked by B.L.
Exterior Ambient Noise Level dB(A): 41.3

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 75.4 1 75.6
2 74.9 2 75.4
3 74.6 3 75.7
4 75.2 4 75.7
5 74.6 5 75.5
Average of two highest actual noise levels = 75.3 dB(A) Average of two highest actual noise levels = 75.7 dB(A)