Terminal 2 Space Program
Noise contours are computed for Part 150 studies using the FAA's Integrated Noise Model (INM). The INM is the only model generally approved by the FAA for use in Part 150 studies and other environmental noise analyses in the U.S. The noise pattern calculated by the INM for an airport is a function of several factors, including: the number of aircraft operations during the period evaluated, the types of aircraft flown, the time of day when they are flown, the way they are flown, how frequently each runway is used for landing and takeoff, and the routes of flight used to and from the runways. Substantial variations in any one of these factors, when extended over a long period of time, may cause marked changes to the noise pattern. The exhibit below lists the typical input data for INM noise contour modeling and the typical sources of that data.
