When Fragrance Seems to Disappear: Understanding Olfactory Adaptation
Have you ever lit a candle, noticed its fragrance immediately and then, a short time later, wondered where the scent had gone?
Perhaps you have returned after being outside and suddenly noticed it again—or someone has entered the room and commented on a fragrance you can barely detect.
In her published review, Psychophysical and Behavioral Characteristics of Olfactory Adaptation, researcher Pamela Dalton explains that repeated or prolonged exposure to an aroma typically reduces our sensitivity to that particular scent. She also found that the strength of the fragrance and the length of exposure can influence how much our sensitivity decreases and how quickly it recovers.
Put simply, the fragrance may still be present, but our sense of smell has adjusted to it. After some time away from the aroma, we may begin to notice it again.
This natural response is known as olfactory adaptation. In this article, we explore why it happens, what it means for the way we experience fragrance and how a simple pause can help us reconnect with a familiar scent.
Why do our senses respond this way?
Our senses constantly receive information about the world around us.
Olfactory adaptation helps us reduce our response to familiar background aromas so that we can remain alert to changes in our environment.
This is why you might stop noticing the fragrance in your own home while someone entering the space detects it immediately.
Dalton also found that the strength of the fragrance and the length of time we are exposed to it can influence both the degree of adaptation and how quickly our sensitivity recovers.
The research behind this article
This article was informed by Pamela Dalton’s published review: