BE-35

PROTERRA, INC. Pdf Download PDF Report

Exterior Noise Test

Accelerating from Standstill

Date : 2011-12-13
Personnel : J.S., S.C., T.S. & B.L.
Temperature (°F) : 42 Humidity (%) : 41
Wind Speed (mph) : 0 Wind Direction : Calm
Barometric Pressure (in.Hg) : 30.4
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): 33.7

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 56.8 1 56.8
2 56.7 2 57.1
3 55.9 3 56.8
4 55.9 4 57.6
5 56.1 5 56.7
Average of two highest actual noise levels = 56.8 dB(A) Average of two highest actual noise levels = 57.4 dB(A)