1. 1Zorumski, W. E. "Aircraft NoisePredictionProgramTheoretical Manual,Parts1 and2,"NASA TM-83199,1982;Latest revision: Level 31.
2. 3GasTurbineJet ExhaustNoisePrediction, SAE AerospaceRecommended PracticeARP 876, Societyof Automotive Engineers, March1978.
3. 4Hough, J.andWeir, D. "Small EngineTechnology(SET) - Task 13 ANOPP NoisePrediction forSmall Engines:Jet, Core, andTurbineModuleRevisions,"Allied SignalEnginesReport No.21-9655,1997.