I am a city girl, born and raised uptown in Manhattan (Harlem).
When you grow up in an urban environment, here are some of the sounds in the city you may hear:
Wake up to roars of the ambulance whizzing by your window
The loud sirens and flashing lights of a police cruiser
The exhaust releasing from the bus as it makes its stops
The pop of someone letting off rounds from a gun
Music blasting from the radio of a passing car
The breaks on garbage trucks stopping to pick up trash