noise level attenuation curve

noise n acoustic noise actual noise level measurement actual sideline noise level aerodynamic noise aggregate noise duration aircraft noise abatement operating procedures aircraft noise annoyance aircraft noise certificate aircraft noise pollution aircraft noise prediction program airport noise contour ambient noise ambient noise level approach noise angle approach noise level approach noise measurement approach noise path approach noise reference point atmospheric noise attenuate noise augmented lift system noise certificated noise level Committee on Aircraft Noise community noise level composite noise rating continuous perceived noise level contour of perceived noise corrugated noise suppressor current noise technology standard design noise level dipole-type noise field directional noise measurement duration of noise effect environment control system noise equal noise contour exhaust noise suppressor flight test noise measurement flyover noise flyover noise level flyover noise limit flyover noise measurement flyover noise test generalized noise characteristics ground run-up noise abatement ignition noise jet noise jet noise prediction technique landing noise lateral noise measurement distance level flight noise requirements main rotor noise maximum permissible noise level measured noise data minimum noise procedure minimum noise route noise abatement device noise abatement measures noise abatement procedures noise abatement takeoff noise abatement technique noise abatement thrust cutback noise absorbing wedge noise absorption noise absorption coefficient noise annoyance rating system noise attenuation noise cancelling noise carpet noise certification approach path noise certification procedure noise certification reference conditions noise certification scheme noise certification standard noise certification takeoff flight path noise certification test conditions noise characteristics noise charge noise control noise control technique noise curfew noise directivity noise dissipation noise disturbance noise dose contour noise environment noise evaluation noise evaluation method noise evaluation procedure noise exposure assessment method noise exposure contour noise exposure forecast noise field noise filter noise floor noise footprint noise generation noise immunity noise insulation noise level noise level attenuation curve noise level radiation noise level value noise map noise measurement location noise measurement procedure noise meter noise monitoring noise muffler noise path noise path length noise preferential route noise preferential runway noise pressure level noise propagation noise propagation pattern noise reduction noise reduction modification noise reduction requirements noise scale noise sertification test noise spectrum noise suppression noise suppression device noise suppressor noise test noise thrust correction originate noise peak perceived noise level permissible noise level radio noise reduce noise reduce noise level reverse thrust noise solar noise standard noise level subsonic noise standard take-off noise takeoff noise takeoff noise angle takeoff noise test test noise turbulence-induced noise unit noise duration

level n above ground level above mean sea level acoustic reference level actual noise level measurement actual sideline noise level aerodrome level aircraft cost level altitude above sea level ambient noise level approach noise level arrival flight level at the ground level automatic level control background level battery electrolyte level be on the level on the hour certificated noise level cloud level community noise level continuous perceived noise level correlation of levels cruising level day-night sound level departure flight level design noise level deviation from the level flight en-route change of level eye level path fare level flight level flight level table fly at a low level fly level flyover noise level freezing level fuel level gage fuel low level switch (в баке) ground level high level network high level significant weather chart holding flight level illumination level international standard atmosphere level keep level layer between levels level attitude level control level cruise level down level flight level flight noise requirements level flight path level flight time level flying level gage level graticule level information level landing level of airworthiness level off level of safety level of speech interference level slope direction level switch (напр. топлива) level the aircraft out level turn level up liquid level switch (гироскопического прибора) lower flight level low level wind-shear alert system maintain the flight level maximum permissible noise level mean sea level mean sea level pressure minimum cruising level minimum level noise level noise level attenuation curve noise level radiation noise level value noise pressure level odd flight level oil level hole oil level tube output level overall sound pressure level peak perceived noise level permissible noise level pilot ability level pilot experience level precision sound level meter preset flight level reach the flight level recording level reduce noise level reference fare level remain level report reaching the flight level runway level safe level safety level sea level sea level atmospheric density single level overflight measurement skill level slope of level (шумов) sound exposure level sound level history sound level meter sound pressure level staggered flight level standard foreign fare level standard industry fare level standard noise level table of cruising levels takeoff surface level tank level indicator target level of safety tariff level factor threshold level transition level upper flight level upper level control area usable flight level

attenuation n atmospheric attenuation attenuation rate attenuation treatment ground attenuation noise attenuation noise level attenuation curve shock-wave attenuation sound attenuation sound attenuation coefficient

curve adj altitude curve climb curve curve of equal bearings entry curve envelope curve frequency weighting curve noise level attenuation curve payload-range curve polar curve quadrantal error calibration curve thrust curve thrust versus speed curve turnoff curve