UDTV-29

NORTH AMERICAN TRANSIT, INC.

Exterior Noise Test

Accelerating from Standstill

Date : 1995-01-19
Personnel : R.L., B.R., & R.H.
Temperature (°F) : 39 Humidity (%) : 75
Wind Speed (mph) : 5 Wind Direction : SW
Barometric Pressure (in.Hg) : 30.02
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): 46.9

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 78.5 1 79.0
2 78.6 2 79.9
3 77.3 3 78.0
4 78.7 4 78.6
5 77.2 5 78.3
Average of two highest actual noise levels = 78.7 dB(A) Average of two highest actual noise levels = 79.5 dB(A)