CNG LFS 40

NOVA BUS, DIVISION OF VOLVO GROUP CANADA Pdf Download PDF Report

Exterior Noise Test

Accelerating from Standstill

Date : 2013-09-26
Personnel : S.R., T.S., E.D. & R.S.
Temperature (°F) : 67 Humidity (%) : 57
Wind Speed (mph) : 3 Wind Direction : E
Barometric Pressure (in.Hg) : 30.07
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.R.
Initial Sound Level Meter Calibration: true checked by T.S.
Exterior Ambient Noise Level dB(A): 42.4

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 73.7 1 71.4
2 73.1 2 71.2
3 72.9 3 71.6
4 73.7 4 71.3
5 71.7 5 71.1
Average of two highest actual noise levels = 73.7 dB(A) Average of two highest actual noise levels = 71.5 dB(A)