CTS

CHAMPION BUS INC. Pdf Download PDF Report

Exterior Noise Test

Accelerating from Standstill

Date : 2004-05-25
Personnel : R.C., T.S., and S.C.
Temperature (°F) : 63 Humidity (%) : 67
Wind Speed (mph) : 6 Wind Direction : w
Barometric Pressure (in.Hg) : 29.94
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): 42.7

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 74.2 1 75.5
2 74.1 2 75.1
3 74.3 3 75.4
4 74.4 4 75.3
5 74.3 5 75.4
Average of two highest actual noise levels = 74.4 dB(A) Average of two highest actual noise levels = 75.5 dB(A)