For example you open a new air freshener and you smell it and it lasts for a few days but does your nose ‘get used’ to the fragrance and you stop smelling it?
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Although there is something to be said about the amount of chemicals present in the air, and thsnkuffly the other commenters did. This is however, also a biology question.
What you’re describing is called olfactory fatigue, also known as nose blindness. It is a phenomenon, that prolonged exposure to specific smells causes a lack of its perception. When you apply perfume, you smell it for a few minutes, but after some time, people around you can smell it and hopefully complement you, but you can’t smell it anymore. The same goes with unpleasant odors.
Noseblindness comes from a negative feedback loop that basically prevents further sensation of the smell. This is basically a built-in limiter that works in a complicted way to prevent further sending of electrical impulses to the olfactory cortex.
If you have further wuestions, please ask.
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