The typical way of describing a perfume is using the elements of the fragrance notes. We use a musical language to describe the fragrances, and this is called the fragrance notes. This musical methaphor has 3 types of notes, the top notes, the middle notes and the base notes. This is then called the mermonius scent accord. You can use these notes to describe all type of fragrances, like the Eau de Parfum for women and Eau de Toilette for Women.
The top notes is the scents that are perceived immediately on application of a fragrances. Top notes consist of small, light molecules that evaporate quickly. They form a person’s initial impression of a perfume and thus are very important in the selling of a fragrances. Also called the head notes.
The middle notes are the scent of a fragrances that emerges just prior to when the top notes dissipate. The middle note compounds form the heart of a perfume and act to mask the often unpleasant initial impression of base notes, which become more pleasant with some time. These notes are also called the heart notes.
The base notes are the scent of a perfume that appears close to the departure of the middle notes. The base and middle notes together are the main theme of a perfume. Base notes bring depth and solidity to a perfume. Compounds of this class of scents are typically rich and are usually not perceived until 30 minutes after use.
Perfume Ladies has a good guide telling you more about how to describe the various scents in fragrances. Overall though, the scents in the top and middle notes are influenced by the base notes. The scents of the base notes will be altered by the type of fragrance materials used as middle notes. Producers of perfume usually publish fragrances notes and typically they present it as fragrance pyramid, with the components listed in imaginative and abstract terms.