The City is Noisy
Cities are noisy. I didn’t realize it until I started walking around at night with a sleeping baby. What I had thought was quiet really wasn’t anymore. Holding the baby sensitizes you so that each passing car (~100 dB) sounds like a jet plane at takeoff (also ~100 dB). Add on car alarms, loud people, and the occasional low-flying helicopter, and you’ve got enough background noise to drive you crazy if you choose to pay attention.
It makes me want to move out to the country.
The amazing thing is that very little of this kafuffle ever wakes the baby.