CD-291

CHAMPION BUS INC.

Exterior Noise Test

Accelerating from Standstill

Date : 1994-12-01
Personnel : R.L. & R.H.
Temperature (°F) : 36 Humidity (%) : 57
Wind Speed (mph) : 8 Wind Direction : WSW
Barometric Pressure (in.Hg) : 30.38
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 R.L.
Initial Sound Level Meter Calibration: true checked by R.L.
Exterior Ambient Noise Level dB(A): 44.7

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 71.7 1 71.9
2 72.4 2 72.9
3 72.7 3 72.4
4 72.5 4 72.5
5 72.1 5 72.6
Average of two highest actual noise levels = 72.6 dB(A) Average of two highest actual noise levels = 72.8 dB(A)