some things stand out when everything else is quiet
i’ve noticed that i can sit on my porch and immediately notice the smell of a passing car. sometimes it’s only one vehicle, but the exhaust catches my attention right away.
what’s interesting is that i don’t notice the smell nearly as much when i’m eating at a roadside restaurant, even though there are many more cars passing by.
at first, that seems backward. more traffic should mean more exhaust.
a car that just started smells different
one reason is that many of the cars near home are just starting their day.
when an engine is cold, it produces more noticeable fuel-related odors. the emissions system also needs time to warm up before it works at its best. during those first few moments, the smell can be much stronger than from a car that has already been driving for several minutes.
that means a single car leaving a driveway can be easier to smell than dozens of cars already moving down the road.
food changes what we notice
when i’m sitting on the porch, there isn’t much competing for my attention.
at a restaurant, the smell of grilled meat, stir-fried dishes, coffee, soup, or fresh food fills the air. my brain focuses on those smells instead.
the exhaust is still there, but it becomes part of the background while the food moves to the foreground.
our noses get used to things quickly
another possibility is that our sense of smell adapts.
when we stay in the same environment for a while, our brains start filtering out familiar smells. a constant background odor becomes less noticeable, while a new smell immediately stands out.
that’s why one passing car can grab my attention at home, while continuous traffic near a roadside restaurant almost disappears from my awareness.
it might not be the amount of exhaust
what i’ve learned is that noticing a smell and being exposed to a smell are not always the same thing.
sometimes a single car stands out because the air is calm, the engine has just started, or there aren’t many other smells around. on another day, hundreds of passing vehicles may barely register because my attention is somewhere else.
the difference isn’t always in the cars.
sometimes it’s in where i’m sitting, what i’m doing, and what my brain decides is worth noticing.