World Trans T24

Collins Bus Corp. d.b.a. World Trans Pdf Download PDF Report

Exterior Noise Test

Accelerating from Constant Speed

Date : 2016-09-01
Personnel : S.R., E.D. & C.S.
Temperature (°F) : 70 Humidity (%) : 80
Wind Speed (mph) : 6 Wind Direction : NE
Barometric Pressure (in.Hg) : 30.0
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
Initial Sound Level Meter Calibration: true checked by
Exterior Ambient Noise Level dB(A): 39.1

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 71.3 1 69.4
2 70.6 2 69.6
3 70.8 3 69.9
4 70.4 4 69.8
5 67.5 5 68.9
Average of two highest actual noise levels = 71.1 dB(A) Average of two highest actual noise levels = 69.9 dB(A)