229 SLF

DAIMLER CHRYSLER COMMERCIAL BUSES NA Pdf Download PDF Report

Exterior Noise Test

Accelerating from Standstill

Date : 2004-05-17
Personnel : R.C., T.S. and S.C.
Temperature (°F) : 73 Humidity (%) : 51
Wind Speed (mph) : calm Wind Direction : calm
Barometric Pressure (in.Hg) : 30.18
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 S.C.
Initial Sound Level Meter Calibration: true checked by S.C.
Exterior Ambient Noise Level dB(A): 43.9

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 79.3 1 83.3
2 79.9 2 83.9
3 79.9 3 82.9
4 79.8 4 83.7
5 79.5 5 83.9
Average of two highest actual noise levels = 79.9 dB(A) Average of two highest actual noise levels = 83.9 dB(A)