I've been around a few suburbs in the USA and they aren't quiet to my ears, they sound dead for a lack of a better word. Dead with the odd noise from a car's engine and tyres (usually a pickup truck), lawn mower, leaf blower rushing through it.
Absolute silence is not even natural, it gives me the creeps when I'm in a deafening silent ambient.
Natural noises have a rhythm that doesn’t stress us out and wake us. Methodical.
A busy road can mostly start to blend into white noise. Unless it’s absolute sociopaths honking in residential neighborhoods.
Suburbs though have leaf blowers that your asshole neighbor uses 2 hours before it’s legal to use it.
That noise is inconsistent, and it is the worst sound. Some people just suck though.
Florida. Key West. Protected bird species. The parking lot roosters. Nothing methodical about them.