LC 200

CHAMPION BUS INC. Pdf Download PDF Report

Exterior Noise Test

Accelerating from Standstill

Date : 2007-05-18
Personnel : P.D., T.S. and S.C.
Temperature (°F) : 50 Humidity (%) : 71
Wind Speed (mph) : 9 Wind Direction : NE
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): 34.6

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 71.3 1 70.3
2 70.8 2 70.2
3 71.1 3 70.5
4 70.9 4 70.8
5 71.2 5 70.6
Average of two highest actual noise levels = 71.3 dB(A) Average of two highest actual noise levels = 70.7 dB(A)