F-35 Acoustics Based on Edwards AFB Acoustics Test

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1、JointCommunicationsReleaseJSFProgramOffice&LockheedMartinSubject:F-35AcousticsBasedonEdwardsAFBAcousticsTestDate:April2009F-35AcousticsTesting:ModernandComprehensiveAcomprehensivesetoffighteraircraftacousticsdataDesignedtoproducethemostmodernandaccurateacoust

2、icprofileevergeneratedforamilitaryaircraftPreliminaryconclusionsbasedonextensiveanalysisofacousticstestdatacollectedOctober2008atEdwardsAFBonF-35AOver170microphonesusedtoobtainacousticdataMaintenanceandoperationspersonnelacoustics(NearField)Communityacoustics(FarF

3、ield)LargearrayofmeasurementsFrom0to300ftabovegroundFrom25ftto7mileslaterallyMulti-nationalcooperativetestDirectedbyAFRL–arecognizedauthorityinacousticsTestdatausedinU.S.andinternationallyforenvironmentalanalysisAdditionaldatastilltobeanalyzed,butinitialanalysis&v

4、alidationshowsF-35AcomparabletocurrentaircraftF-35AcousticsTesting:ResultsMaintenanceandOperationsPersonnelAcoustics(NearField)MarginallylessthanorcomparabletotheF-22,F-18E/F,andF-16withanF-100-PW-229engineatmilitaryandafterburnerpower.ComparabletoanF-15CwithF-10

5、0-PW-100enginesatmilitaryandafterburnerpower.CommunityAcoustics(FarField)TheF-35communityacousticsarecomparabletotheacousticsofothercurrentgenerationaircraftExamplesincludeF-22AandF-18E/FAcousticlevelsexperiencedbythepublicdependonanumberofconditionsObserverlocati

6、oninrelationtoaircraftFlightprofiles(Aircraftconfiguration,aerodynamics,powersettings,approach&departureprofiles,andairspeed)Weather:Temperature,Humidity,WindAirfieldacoustics:Reflectivestructures,vegetationandterraininandaroundairfieldTimeofdayTotalnumberofflight

7、operationsperyearF-35AcousticsTesting:AcousticsBackgroundQuestionsWhydoestheMaintenanceandOperationsPersonnelAcoustics(NearField)chartuseadifferentsetofunitsthantheCommunityAcoustics(FarField)chart?TheMaintenanceandOperationsPersonnelAcoustics(nearfield)chartrela

8、tessoundlevel(indB)becausethisisthemostappropriatemeasureofthesteady,continuoussoundreceivedbypersonnelwhoworkincloseproximitytoaircraftwithrunningengin