The impulses combine in the olfactory nerves and are carried to the olfactory bulbs.
The olfactory bulbs process the specific combination of impulses into smells.
From the bulbs, the smells travel to the amygdala, hippocampus, thalamus, and neocortex where they are processed, alerted to your consciousness, and stored into your memory.
"How Smells Trigger Memories." YouTube. N.p., 20 July 2015. Web. 22 Apr. 2017. .
"How to Master Your Sense of Smell - Alexandra Horowitz." YouTube. N.p., 09 Jan. 2017. Web. 22 Apr. 2017. .
"The Smell Report." The Smell Report - The Human Sense of Smell. N.p., n.d. Web. 22 Apr. 2017. .