If you live by an airport here in the Twin Cities you already know how noisy it is. This noise focuses on noise caused by transportation, which here is basically everywhere.
Mainly around MSP international airport is the nosiest place in the area, followed by other airports such as Flying Cloud, and St Paul's Downtown Airport. If you live in that bright pink and purple area you might want to consider moving else where.
Noise is measured in decibels, 80 decibels for the purple area on the map is equivalent to the garbage truck outside your home, while that light orange is about 35 decibels which could be the same as your refrigerator running.