AH-28 TROLLEY

CHANCE COACH, INC. Pdf Download PDF Report

Exterior Noise Test

Accelerating from Constant Speed

Date : 1993-03-31
Personnel : B.L., B.R., and R.H.
Temperature (°F) : 55 Humidity (%) : 50
Wind Speed (mph) : 4 Wind Direction : ne
Barometric Pressure (in.Hg) : 29.86
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 RL
Initial Sound Level Meter Calibration: false checked by RL
Exterior Ambient Noise Level dB(A): 49.4

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 77.3 1 80.5
2 77.4 2 80.6
3 77.6 3 80.7
4 77.9 4 80.1
5 77.1 5 80.1
Average of two highest actual noise levels = 77.8 dB(A) Average of two highest actual noise levels = 80.7 dB(A)