SLC 32' CNG

DAIMLER CHRYSLER COMMERCIAL BUSES NA Pdf Download PDF Report

Exterior Noise Test

Accelerating from Standstill

Date : 2002-03-08
Personnel : S.C., B.S., & E.D.
Temperature (°F) : 56 Humidity (%) : 70
Wind Speed (mph) : Wind Direction : Calm
Barometric Pressure (in.Hg) : 30.33
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): 47.5

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 78.6 1 83.2
2 79.5 2 84.5
3 78.7 3 84.5
4 79.2 4 84.0
5 79.4 5 84.4
Average of two highest actual noise levels = 79.5 dB(A) Average of two highest actual noise levels = 84.5 dB(A)