Just a quick thing to think about - I deal with sensitivity to certain smells (some pleasant to most, others not so much) and ANY low pitched noise (base). These things can (and do) case nauseia, dizziness, headache. There is also a loss of hearing in one ear, NOT specific to those things, just there all the time since age 25)
The base of it apparently has to with the ear. It seems to come down to a condition known as Menieres (named after the French doctor that first discovered it). But it takes a lot to get to that Dx - basically after tests have not found anything else that could produce those symptoms, that is what you end up with.