The document discusses noise complaints and abatement procedures at major US airports. It provides data on the number of noise complaints per 10,000 flight operations from 2000-2005 for 10 airports. It also lists common noise abatement procedures like preferential runways, engine run-up restrictions, and noise monitoring equipment that are used at the top 10 airports by operations. The document also includes details on a residential sound insulation program at one airport that mitigated noise in 155 homes at a total cost of $3.6 million.