30LFN

NORTH AMERICAN BUS INDUSTRIES Pdf Download PDF Report

Exterior Noise Test

Stationary

Date : 2004-03-24
Personnel : G.M., T.S. and S.C.
Temperature (°F) : 51 Humidity (%) : 35
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): 42.7

Accessories and Air Conditioning ON
Throttle Position Engine RPM Curb (Right) Side dB(A) Street (Left) Side dB(A)
Measured Measured
Low Idle 799 58.4 57.1
High Idle 1150 60.5 63.1
Wide Open Throttle 2760 74.4 75.2

Accessories and Air Conditioning OFF
Throttle Position Engine RPM Curb (Right) Side dB(A) Street (Left) Side dB(A)
Measured Measured
Low Idle 802 63.1 56.1
High Idle 1144 60.5 60.6
Wide Open Throttle 2762 72.9 75.4