ECOMARK SHUTTLE BUS

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Exterior Noise Test

Accelerating from Standstill

Date : 1999-11-12
Personnel : B.L. 7 R.H.
Temperature (°F) : 47 Humidity (%) : 40
Wind Speed (mph) : 5 Wind Direction : SW
Barometric Pressure (in.Hg) : 30.31
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 B.L.
Initial Sound Level Meter Calibration: true checked by B.L.
Exterior Ambient Noise Level dB(A): 43.9

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 72.0 1 71.3
2 71.8 2 71.9
3 72.7 3 71.0
4 73.1 4 71.5
5 72.5 5 71.4
Average of two highest actual noise levels = 72.9 dB(A) Average of two highest actual noise levels = 71.7 dB(A)