ENVIRO 500

ALEXANDER DENNIS INC. Pdf Download PDF Report

Exterior Noise Test

Accelerating from Standstill

Date : 2008-03-06
Personnel : SC and ED
Temperature (°F) : 41 Humidity (%) : 53
Wind Speed (mph) : 4 Wind Direction : ssw
Barometric Pressure (in.Hg) : 30.15
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 SC
Initial Sound Level Meter Calibration: true checked by SC
Exterior Ambient Noise Level dB(A): 44.7

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 88.3 1 85.0
2 86.2 2 87.3
3 86.1 3 86.9
4 85.9 4 87.4
5 87.5 5 86.7
Average of two highest actual noise levels = 87.9 dB(A) Average of two highest actual noise levels = 87.4 dB(A)