PC 50500

NAVISTAR INC. Pdf Download PDF Report

Exterior Noise Test

Accelerating from Constant Speed

Date : 2010-04-27
Personnel : C.S., T.S. & S.C.
Temperature (°F) : 49 Humidity (%) : 48
Wind Speed (mph) : 12 Wind Direction : NNW
Barometric Pressure (in.Hg) : 29.51
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 T.S.
Initial Sound Level Meter Calibration: true checked by T.S.
Exterior Ambient Noise Level dB(A): 14.9

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 71.9 1 72.7
2 72.7 2 72.6
3 72.8 3 72.4
4 72.1 4 72.3
5 71.8 5 72.5
Average of two highest actual noise levels = 72.8 dB(A) Average of two highest actual noise levels = 72.7 dB(A)