Enhanced Modeling of Aircraft Taxiway Noise, Volume 1: Scoping (2009) / Chapter Skim
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C-1 APPENDIX C: Washington Dul les Internat ional Airport Breakaway Thrust Noise Measurements C.1 . Measurement Descr ip t ion A characterization of breakaway thrust from taxiing aircraft noise was successfully made based on measurements conducted at Washington Dulles International Airport (IAD)
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C-2 Figure C-1: Map of Washington Dulles International Airport (IAD) (Image credit: airnav.com)
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C-3 Figure C-2: IAD Taxi Noise 2 Microphone Setup (Background image Copyright 2008 Commonwealth of Virginia) Table C-1 lists all aircraft passing the microphone array throughout the measurement period.
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C-4 IGW 227AA 11:32 American DC-9-82(MD-82) P & W JT8D SERIES 375P 11:37 GA - Private PIPER PA-28-161 LYCOMING 0-320 SERIES 139SK 11:40 GA - Private LEARJET 55 GARRETT TFE 731 SER 803TA 11:54 GA - Flight Options HAWKER 800XP ALLIEDSIGN TFE731-5BR 691WN 12:15 Southwest Boeing 737-3G7 CFM INTL CFM56 SERIES x 75996 12:18 United Express / Mesa CANADAIR CL-600-2B19 GE CF34 SERIES 654UA 12:24 United Airlines Boeing 767-322 Pratt & Whitney PW4000 SER 351UA 12:25 United Airlines Boeing 737-322 CFM INTL CFM56 SERIES 27172 12:27 United Express CANADAIR CL-600-2B19 GE CF34 SERIES 17156 12:28 United Express CANADAIR CL-600-2B19 GE CF34 SERIES 508QS 12:28 GA - Private Gulfstream GV BMW ROLLS BR 700 SERI 470UA 12:30 United Airlines Airbus A320-232 IAE V2500 SERIES 242CJ 12:37 United Express SAAB 340B GE CT7-Series 854UA 12:37 United Airlines Airbus A319-131 IAE V2500 SERIES x 512MJ 12:40 United Express/Mesa CL-600-2C10 GE CF34 SERIES UNK 12:40 United Express UNK UNK UNK x 196CJ 12:42 United Express / Colgan Air SAAB 340B GE CT7-9B x 469UA 12:43 United Airlines Airbus A320-232 IAE V2500 SERIES 933UA 12:45 United Airlines Boeing 737-522 CFM INTL CFM56 SERIES 290SK 12:46 United Express Embraer EMB-145LR Rolls Royce /Allison AE 3007A1P x 809HK 12:49 Trans States Airlines Embraer EMB-145EP Rolls Royce /Allison AE 3007A 856RW 12:49 United Express Embraer ERJ 170-100 SE GE CF34 SERIES 210CJ 12:53 United Express/Colgan Air SAAB 340B GE CT7-Series 292SK 12:54 United Express Embraer EMB-145LR Rolls Royce /Allison AE 3007A1P 220MJ 12:55 United Express / Colgan Air SAAB 340B GE CT7-SER 37208 12:56 United Express CL-600-2B19 GE CF34 SERIES 311CE 12:57 United Express SAAB 340B GE CT7-SER x 561UA 12:58 United Airlines Boeing 757-222 Pratt & Whitney PW2040 341CJ 12:59 United Express / Colgan Air SAAB 340B GE CT7-SER 679DA 13:03 Delta Boeing 757-232 Pratt & Whitney PW2037 845HK 13:05 United Express / Trans States EMB-145LR Rolls Royce /Allison AE3007 SER 835HK 13:07 United Express EMB-145LR Rolls Royce /Allison AE3007 SER 977RP 13:09 United Express EMB-145 Rolls Royce /Allison AE 3007A1P x 47202 13:14 United Express CL-600-2B19 GE CF34 SERIES 849HK 13:15 United Express EMB-145LR Rolls Royce /Allison AE3007 SER 982NA 13:16 GA Private Cessna 550 P&W Canada JT15D-4 x 555AN 13:17 American Airlines DC-9-82(MD-82)
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C-5 C.2 . Analys is A certain challenge in analysis of this data was deciphering the noise from departing aircraft from the desired breakaway thrust noise component.
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C-6 A look at this time period for the overall sound pressure graph (Figure C-3) correlates to an increase in unweighted overall acoustic level of 4 dB, from 97 dB to 101 dB.
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C-7 10 15 20 25 30 35 40 60 65 70 75 80 85 90 95 100 ISO Third Octave Band Number Le ve l [d B re 20 m ic ro Pa ] A320 Spectrum During Idle (t = 23 to 33 s)
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C-8 Figure C-7. Boeing B757 Taxi Event Spectrogram 10 15 20 25 30 35 40 60 65 70 75 80 85 90 95 100 ISO Third Octave Band Number Le ve l [d B re 20 m ic ro Pa ]
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C-9 particular engines may lend itself to require less time of maintained increased thrust. This is evident in the B757 spectrogram (Figure C-7)
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