2. Principles of sensory metrology

2.1 Sensitivities involved

• Visual sensitivity

It is due to the excitation of receptors located on the retina (cones and rods) and is probably the best-known and best-understood sensitivity: we all know what a visual sensory image is. In fact, several people can "share" the same visual image at the same time, so that it will generate, almost automatically, a semantic or artistic communication.

• Olfactory sensitivity

A large proportion of the organoleptic...