LC 200

CHAMPION BUS INC. Pdf Download PDF Report

Exterior Noise Test

Accelerating from Constant Speed

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: false checked by S.C.
Exterior Ambient Noise Level dB(A): 48.8

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 69.9 1 69.4
2 69.8 2 69.5
3 69.7 3 69.0
4 70.1 4 69.1
5 69.8 5 69.3
Average of two highest actual noise levels = 70.0 dB(A) Average of two highest actual noise levels = 69.5 dB(A)