http://www.chicagotribune.com/news/l...,5194238.story
Per the Trib today.
At least temporarily, the safety-related changes implemented April 15 at O'Hare mean more jet noise for suburbs immediately west and southwest of the airport and Chicago neighborhoods east of O'Hare, officials said.
Areas directly west, southwest and east of O'Hare will be exposed to up to several hundred additional flights overhead between 7 a.m. and 10 p.m. daily, under the FAA changes aimed at reducing the risk of mid-air collisions.
Communities northwest and northeast of the airport are projected to get some noise relief, under the FAA changes.