Method for Predicting Lateral Attenuation of Airplane Noise
- Aerospace Standard
turbofan-powered transport-category airplanes with engines mounted at the rear of the fuselage (on the sides of the fuselage or in the center of the fuselage as well as on the sides) or under the wings
propeller-driven transport-category or general-aviation airplanes
propagation over ground surfaces that may be considered to be “acoustically soft” such as lawn or field grass
situations where the terrain to the sides of the flight paths is not necessarily flat with receiver locations that are elevated above or depressed below the corresponding point on the ground under a flight path
flight paths that include turns such that the airplane is banked.
propagation over ground surfaces that are considered to be “acoustically hard” such as frozen or compacted soil, ice, or water
propagation over ground surfaces that contain many large structures, extensive forests, and similar objects
propagation over ground surfaces with significant undulating terrain
the sound produced by helicopters.
Data Sets - Support Documents
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|TABLE B1||HISTORIC DATA SOURCES FOR LONG-RANGE AIR-TO-GROUND LATERAL ATTENUATION|
|TABLE D1||ENGINES UTILIZED IN OVER-GROUND SPECTRAL ASSESSMENT|
|TABLE F1||JET AIRPLANE ENGINE LOCATION ASSIGNMENTS|
To develop and maintain relevancy of recommended practices for aircraft noise measurement and guidance for modeling of both aircraft noise and aviation emissions and to promote a unified technical approach to support the practical assessment of their impact.