D4500

MOTOR COACH INDUSTRIES Pdf Download PDF Report

Exterior Noise Test

Stationary

Date : 2006-06-20
Personnel : B.S., T.s. and S.C.
Temperature (°F) : 72 Humidity (%) : 54
Wind Speed (mph) : 5 Wind Direction : w
Barometric Pressure (in.Hg) : 29.97
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): 44.8

Accessories and Air Conditioning ON
Throttle Position Engine RPM Curb (Right) Side dB(A) Street (Left) Side dB(A)
Measured Measured
Low Idle 700 64.8 64.6
High Idle 1399 71.0 71.3
Wide Open Throttle 2118 75.2 75.3

Accessories and Air Conditioning OFF
Throttle Position Engine RPM Curb (Right) Side dB(A) Street (Left) Side dB(A)
Measured Measured
Low Idle 700 63.1 62.4
High Idle 1399 68.5 68.1
Wide Open Throttle 2118 74.7 75.7