The olfactory pyramid is a model used to describe the structure of a fragrance. The olfactory pyramid consists of three levels: top notes, heart notes, and base notes.
Top notes are the first olfactory sensations perceived when smelling a perfume. They are generally fresh and light, and are only felt for a few minutes after the perfume is applied. Top notes may include fruits, herbs, spices and other light fragrances.
Heart notes are the fragrances that are perceived after the top notes have dissipated. They are more persistent and last for a longer period of time. Heart notes may include flowers, berries, plants, and other more complex fragrances.
Base notes are the fragrances that remain on the skin for a long time after the top and heart notes have dissipated. They are often more intense and may include woods, moss, amber and other deeper fragrances.
The olfactory pyramid is used to describe how a fragrance develops and changes over time when it is worn. The top, heart and base notes work together to create a unique olfactory experience. The olfactory pyramid helps perfume developers create balanced and complex fragrances, and helps consumers better understand what they are smelling when they wear a fragrance.