Only badly made cities, where authorities do not care about noise, are loud. And the irony is that most of the noise comes from people living outside of the cities, bringin their cars outside in the typical egoism of the modern suburbanite and rural inhabitants.
It is like people who complain about public teansports who are usually the ones actively participating in ruining it for everyone.
It's not just authorities, it's cultural. Some cultures are simply much louder than others. I live in Tokyo and it's generally very quiet here, despite (usually older) apartments having a bad reputation for paper-thin walls. Public transit is generally whisper-quiet (as far as the riders; the trains themselves of course are not), as people generally don't talk much, and talking on the phone is prohibited. People who make too much noise will probably get the police called on them, but that only works in a society where there's a culturally low tolerance for noise, so it's not really up to the authorities.
It is like people who complain about public teansports who are usually the ones actively participating in ruining it for everyone.
https://www.youtube.com/watch?v=CTV-wwszGw8