AMERITRANS

TRANSPORTATION MANUFACTURING CORPORATION (TMC) Pdf Download PDF Report

Exterior Noise Test

Accelerating from Standstill

Date : 2006-07-11
Personnel : B.S., T.S. & S. C.
Temperature (°F) : 75 Humidity (%) : 56
Wind Speed (mph) : 5 Wind Direction : SW
Barometric Pressure (in.Hg) : 30.1
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): 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 72.0 1 73.3
2 72.5 2 73.8
3 72.6 3 73.6
4 72.1 4 73.5
5 72.3 5 73.6
Average of two highest actual noise levels = 72.6 dB(A) Average of two highest actual noise levels = 73.7 dB(A)