T24

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

Exterior Noise Test

Accelerating from Constant Speed

Date : 2016-09-28
Personnel : T.S., S.R. & S.B.
Temperature (°F) : 67 Humidity (%) : 51
Wind Speed (mph) : 9 Wind Direction : ESE
Barometric Pressure (in.Hg) : 30.1
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): 45.8

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 69.4 1 68.7
2 69.1 2 69.6
3 70.2 3 70.0
4 70.6 4 70.1
5 70.4 5 70.7
Average of two highest actual noise levels = 70.5 dB(A) Average of two highest actual noise levels = 70.4 dB(A)