T80208 (CNG)

TRANSPORTATION MANUFACTURING CORPORATION (TMC) Pdf Download PDF Report

Exterior Noise Test

Accelerating from Standstill

Date : 1993-04-19
Personnel : B.L., B.S. and R.H.
Temperature (°F) : 66 Humidity (%) : 55
Wind Speed (mph) : 10 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 R.L.
Initial Sound Level Meter Calibration: true checked by RL
Exterior Ambient Noise Level dB(A): 46.5

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 78.3 1 80.5
2 77.2 2 80.0
3 78.2 3 80.1
4 76.9 4 79.8
5 78.3 5 79.9
Average of two highest actual noise levels = 78.3 dB(A) Average of two highest actual noise levels = 80.3 dB(A)