Definitions
Coffee Olfaction
Sense of smelling coffee aromatic volatiles also known as aroma. Breathing air does not reach the olfactory membranes, only when sniffing or swallowing. This forces the air up the nasal passages and over the 10 to 20 million sensory cells, where 2000 to 4000 distinct odors will be detected.
Coffee Gustation
Sense of tasting sweet, salt, sour, and bitter. This is where the flavor is sensed. This occurs in four different regions of the tongue.

