PC 50500

NAVISTAR INC. Pdf Download PDF Report

Exterior Noise Test

Accelerating from Standstill

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): 44.4

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 71.6 1 72.7
2 70.6 2 72.8
3 71.3 3 73.0
4 71.5 4 72.8
5 71.2 5 72.7
Average of two highest actual noise levels = 71.6 dB(A) Average of two highest actual noise levels = 72.9 dB(A)