RE 185D

COLLINS

Exterior Noise Test

Accelerating from Standstill

Date : 1994-10-05
Personnel : R.L., B.R., & R.H.
Temperature (°F) : 48 Humidity (%) : 65
Wind Speed (mph) : 7 Wind Direction : NW
Barometric Pressure (in.Hg) : 30.02
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 R.L.
Initial Sound Level Meter Calibration: true checked by R.L.
Exterior Ambient Noise Level dB(A): 45.3

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 76.3 1 76.3
2 77.1 2 76.4
3 78.2 3 76.1
4 76.8 4 76.7
5 77.3 5 76.5
Average of two highest actual noise levels = 77.8 dB(A) Average of two highest actual noise levels = 76.6 dB(A)