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What is a noise model?

Noise models are computer models used to predict the levels of aircraft noise exposure produced over a geographic area. Noise models are used to efficiently and accurately evaluate aircraft noise including assessing the potential noise impacts resulting from changes in aircraft operations.

The Aviation Environmental Design Tool (AEDT) is the FAA's required noise and environmental modeling application for all U.S. domestic regulatory analyses requiring FAA review. AEDT replaces several legacy environmental modeling tools, including the Integrated Noise Model (INM), the Noise Integrated Routing System (NIRS) and the Emissions Dispersion Modeling System (EDMS).