229 SLF

DAIMLER CHRYSLER COMMERCIAL BUSES NA Pdf Download PDF Report

Exterior Noise Test

Accelerating from Constant Speed

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: false checked by S.C.
Exterior Ambient Noise Level dB(A): 43.2

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 75.6 1 82.2
2 77.1 2 81.2
3 76.5 3 82.6
4 75.9 4 82.2
5 76.8 5 82.1
Average of two highest actual noise levels = 76.9 dB(A) Average of two highest actual noise levels = 82.4 dB(A)