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B-1 Appendix B: T.F. Green Airport (PVD) Taxi Noise Measurements B.1 . T . F . Green State Ai rpor t Tax i Noise Measurement Setup Aircraft taxiway noise was measured at T. F. Green State Airport (PVD) on March 24, 2008. In addition to sound level meters, a video system was deployed in order to obtain aircraft speed and positional information. The accessible measurement location was selected based on the prevailing weather conditions and active runway configuration. The measurement location was adjacent to taxiway T adjacent to runway 5 (Figure B-1). The measurement site was situated approximately 234.81 feet (71.57 meters) from the point of closest approach to an operation (Figure B-2). The taxiway centerline can be seen in figure B-3 highlighted in bold yellow. One Larson Davis 824 sound level meter (SLM) was placed at position Tango1 shown in figures B-2 and B-3. The SLM was placed 1.5 m (4.9 ft) above the ground. The SLM was programmed to collect A-weighted and one-third octave band 1-second time histories. Figure B-1. T. F. Green State Airport
B-2 Figure B-2. Measurement setup at PVD on March 24, 2008 Figure B-3. Close-Up of Measurement setup at PVD on March 24, 2008 B .2 . T . F . Green Tax i Noise F ie ld Measurements On March 24, 2008 Wyle measured the taxiway noise of 7 aircraft operations, ranging from a small propeller aircraft to 737-700s. Figure B-4 contains the field note log sheets from the measurements. Hourly weather data for 24 March 2008 is recorded in Table B-1. The measurement period lasted from 11:00am until 2:00pm.
B-3 Figure B-4. Field note log sheet for 24 March 2008
B-4 Table B-1. TF Green weather for 24 March 2008 B .3 . T .F . Green Tax i Noise Measurement Analys is Table B-2 is a summary of the operations recorded during the measurement interval and the recorded SEL (dBA) event levels for the taxi event. Table B-2. Summary of TF Green Noise events Aircraft Carrier Plane Type Speed (knots) Time Start Time Stop dt SEL 1 - small prop - 11:01:39 11:02:31 52 68.6 2 Continental Express Regional Jet - 11:05:58 11:06:47 49 83.6 3 Southwest 737-700 22.79 12:23:16 12:24:37 81 91.8 4 US Airways Express Embraer 170 17.82 12:35:56 12:37:14 78 93.4 5 Southwest 737-700 19.37 13:10:53 13:12:07 74 88 6 US Airways Express Embraer 170 11.79 13:34:41 13:35:50 69 90.6 7 Continental Express Embraer ERJ-145 12.17 13:38:27 13:40:02 95 88.9 Sound level meter placed 71.57 meters from centerline of taxiway Ambient levels around 45 dB: noise from other planes at gates notes did not have camera did not have camera, either a ERJ-145, ERJ-135 or CRJ200LR