Aircraft Layout PlanAircraft Owners and Pilots Association Decibel Decibel filtered to approximate the human ear Day-Night Average Sound LevelEnvironmental Status and Planning Report Noise EXPosure Fleet Based OperatorFederal Interagency Committee on Aviation Noise General Aviation Generic Environmental Impact ReportHanscom Area TownSHanscom Field Advisory Commisssion Old acronym for Day-Night Average Sound Level Equvalent sound Level Noise Monitoring System Sound Exposure Level Single Engine Piston aircraft Time Above