ENVIRO 500

ALEXANDER DENNIS INC. Pdf Download PDF Report

Exterior Noise Test

Accelerating from Standstill

Date : 2005-06-24
Personnel : R.C. and S.C.
Temperature (°F) : 87 Humidity (%) : 71
Wind Speed (mph) : 5 Wind Direction : sw
Barometric Pressure (in.Hg) : 30.18
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.C.
Initial Sound Level Meter Calibration: true checked by S.C.
Exterior Ambient Noise Level dB(A): 42.0

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 80.3 1 79.2
2 84.3 2 79.1
3 81.0 3 79.4
4 82.9 4 80.7
5 83.8 5 81.9
Average of two highest actual noise levels = 84.1 dB(A) Average of two highest actual noise levels = 81.3 dB(A)