CNG TROLLEY TR35-84

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Exterior Noise Test

Accelerating from Standstill

Date : 2001-12-03
Personnel : S.C., E.D. & B.S.
Temperature (°F) : 40 Humidity (%) : 80
Wind Speed (mph) : 5 Wind Direction : SSW
Barometric Pressure (in.Hg) : 30.3
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): 41.6

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 84.9 1 83.9
2 84.9 2 84.2
3 84.9 3 83.9
4 84.5 4 84.0
5 84.8 5 83.9
Average of two highest actual noise levels = 84.9 dB(A) Average of two highest actual noise levels = 84.1 dB(A)