Airports must comply with the Federal Aviation Regulations Part 150.  What this regulation does is explained scope and purpose section of the 150 document.  Basically, the Part 150 standardizes the procedures for evaluating peoples exposure to airplane noise in the area's surrounding the airport.  Then, using this document, the airport makes suggestions for lessening the effect of the noise.  These suggestions must then be approved by the FAA.  The easiest way to understand it completely is to read the FAR Part 150 document in it's entirety.  Below, supplements to the FAR Part 150 can be found.

Supplements to the FAR Part 150

 Integrated Noise Model Overview
Noise Compatibility Program Checklist Part 1
Noise Compatibility Program Checklist Part 2
Noise Exposure Map Checklist Part 1
Noise Exposure Map Checklist Part 2
Airport Noise & Capacity Act of 1990
49 CFR Part 24: Real Estate Acquisition Regulations
              *Non-regulatory Supplements Included
       Order 5100.37: Land Acquisition and Relocation Assistance for Airport Projects
 

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