> 99% of noise is cars and motorbikes. It depends on where you live. My apartment building is older, built before acoustic norms came into effect. I can hear m

> 99% of noise is cars and motorbikes. It depends on where you live. My apartment building is older, built before acoustic norms came into effect. I can hear my neighbor two floors up wake up in the middle of the night to take a pee. I have 0 issues with traffic or other city noise, even though I like having my windows open and live in Paris, one of the densest cities in the world.