I worked in the loop for about 1.5 years 2016-2017, and I swear it turned me against trains. The noise (both on the train and near the tracks), and the vibration were unbearable.
My team was on the 4th floor of the red CNA building, which was the floor that was said to be high enough that it wasn't specially soundproofed.
We had to interrupt our meetings SEVERAL times every hour because of the noise of passing trains.