Mayor Emanuel said the study will benefit Chicago residents by allowing more homes to qualify for O'Hare’s Residential Sound Insulation Program. 

Noise complaints from residents near O'Hare have soared since flight paths changed to an east/west flow with the completion of Runway 10C/28C in October 2013.

The nationwide survey will review the national day-night average sound level 65 dB, which would create a better understanding of the annoyance level of residents who live near airports.

Officials say Chicago will spend approximately $120 million insulating 4,700 residences over the next 3-5 years, in addition to spending nearly $700 million in the communities neighboring both O'Hare and Midway International Airport