Can a human smell through the ears?
A quick diagram to point out to people who may not know what Eustachian tubes are (#2).



In order for the aromatic molecule to reach the olfactory bulb, it would first have to get through the Tympanic Membrane (#22) [a.k.a. - Eardrum]. The Tympanic Membrane is water/airtight unless pierced.

So, while it's plausible that an aromatic molecule could travel through the Eustachian tubes and enter the pharynx areas, there isn't any way to get into the middle-ear in the first place unless the Tympanic Membrane has been compromised.

In a healthy and intact individual, the answer should be No.