(مكوّنات عطرية تتفاوت في درجة تبخّرها فانتشارها فشميمها ، وكأنّها درجات موسيقية ، ولكن تتعلّق بالشم) Perfume is described in a musical metaphor as having three sets of notes, making the harmonious scent accord. The notes unfold over time, with the immediate impression of the top note leading to the deeper middle notes, and the base notes gradually appearing as the final stage. These notes are created carefully with knowledge of the evaporation process of the perfume.