New law to provide relief from siren noise:
https://www.loopnorth.com/news/siren1210.htm
IMO it doesn't go far enough. When I stayed downtown this past weekend the sirens were way too loud in the middle of the night (2 am, 3 am). When I lived in Manhattan they had a much better solution. Mind you, this was 2006, so they've already had this in place for a while. Emergency vehicles there have 2 "loudness" levels. Daytime and nighttime, and at night the sirens are far quieter. I think with Chicago's central area becoming increasingly a place to live, Chicago should explore doing the same