Golden Gate Trolley

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Exterior Noise Test

Accelerating from Standstill

Date : 2001-05-17
Personnel : S.C., M.H. & B.S.
Temperature (°F) : 52 Humidity (%) : 71
Wind Speed (mph) : 8 Wind Direction : S
Barometric Pressure (in.Hg) : 29.97
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): 46.4

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 84.2 1 84.0
2 83.1 2 84.7
3 84.7 3 84.3
4 84.4 4 83.9
5 84.4 5 84.2
Average of two highest actual noise levels = 84.6 dB(A) Average of two highest actual noise levels = 84.5 dB(A)