Model Universal CNG

GLAVAL BUS/DIV. OF FOREST RIVER Pdf Download PDF Report

Exterior Noise Test

Accelerating from Constant Speed

Date : 2010-09-15
Personnel : B.G., T.S., E.L. & E.D.
Temperature (°F) : 64 Humidity (%) : 49
Wind Speed (mph) : 7 Wind Direction : W
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 T.S.
Initial Sound Level Meter Calibration: true checked by T.S.
Exterior Ambient Noise Level dB(A): 40.9

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 74.7 1 73.4
2 74.7 2 73.9
3 74.0 3 72.7
4 74.5 4 74.1
5 74.9 5 74.5
Average of two highest actual noise levels = 74.8 dB(A) Average of two highest actual noise levels = 74.3 dB(A)