As a person who has lived the last 25 years under a final approach flight path just a few miles south of MSP airport, I can say that I notice very much when planes aren’t following noise abatement restrictions, as they really stand out.
The loudest airplane in recent memory was the Ukrainian built An-225, which was the largest capacity air freight hauler on the planet. I drove to the airport to watch that beast depart. (It was destroyed on the ground at Antonov Airport a couple years ago by Russia during their invasion. 
)
Prior to that, I still remember the incredible noise from Gorbachev’s Ilyusian Il-62 when he stopped in on his tour of America, and having sympathy for the people of Moscow who had to live with those noisy jets constantly.
Whatever work is being done to reduce airport noise is definitely noticeable.
