Student Safety Transporter (SST)

Chestnut Ridge dba Trans Tech Bus, a Transportation Collaborative Co. Pdf Download PDF Report

Exterior Noise Test

Accelerating from Standstill

Date : 2014-04-01
Personnel : T.S., S.R. & M.H.
Temperature (°F) : 54 Humidity (%) : 26
Wind Speed (mph) : 12 Wind Direction : SSW
Barometric Pressure (in.Hg) : 28.71
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.R.
Initial Sound Level Meter Calibration: true checked by S.R.
Exterior Ambient Noise Level dB(A): 40.9

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 72.9 1 72.3
2 72.8 2 73.3
3 75.2 3 75.3
4 75.1 4 75.5
5 75.0 5 73.3
Average of two highest actual noise levels = 75.2 dB(A) Average of two highest actual noise levels = 75.4 dB(A)