CITI BUS HD SENATOR

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Exterior Noise Test

Accelerating from Standstill

Date : 2007-09-12
Personnel : B.S., T.S. and S.C.
Temperature (°F) : 66 Humidity (%) : 55
Wind Speed (mph) : 8 Wind Direction : nw
Barometric Pressure (in.Hg) : 30.06
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): 46.1

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 66.4 1 67.8
2 67.4 2 68.1
3 67.5 3 67.6
4 66.8 4 67.5
5 67.9 5 67.4
Average of two highest actual noise levels = 67.7 dB(A) Average of two highest actual noise levels = 67.9 dB(A)