Student Safety Transporter (SST)

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

Exterior Noise Test

Accelerating from Constant Speed

Date : 2014-04-01
Personnel : T.S., S.R. & M.H.
Temperature (°F) : 52 Humidity (%) : 30
Wind Speed (mph) : 12 Wind Direction : S
Barometric Pressure (in.Hg) : 28.72
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 T.S.
Exterior Ambient Noise Level dB(A): 39.5

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 72.8 1 73.3
2 72.9 2 73.0
3 72.8 3 73.8
4 72.3 4 73.6
5 5
Average of two highest actual noise levels = 72.9 dB(A) Average of two highest actual noise levels = 73.7 dB(A)