ATTB

NORTHROP GRUMMAN

Exterior Noise Test

Accelerating from Constant Speed

Date : 1998-10-29
Personnel : B.L. and B.B.
Temperature (°F) : 50 Humidity (%) : 52
Wind Speed (mph) : 6 Wind Direction : w
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 R.L.L.
Initial Sound Level Meter Calibration: false checked by R.L.L.
Exterior Ambient Noise Level dB(A): 40.4

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 75.5 1
2 77.1 2
3 76.4 3
4 76.8 4
5 75.9 5
Average of two highest actual noise levels = 76.9 dB(A) Average of two highest actual noise levels = N/A dB(A)