Prospero, do you drink diet soda? If so, the aspartame may be contributing to your tinnitus.

Aspartame is a proven neurotoxin which has been linked in medical studies to increased eardrum sensitivity and tinnitus. Especially after some sort of trauma to the eustachian tubes.

I would recommend avoiding anything with aspartame for a week or two and see if your symptoms clear up. Note that almost every brand of chewing gum contains aspartame - even non-sugarless varieties, so read the labels.

BTW, my brother had severe tinnitus and I recommended eliminating aspartame. He didn't believe me and saw a litany of specialists who sent him for hearing tests, brain scans and MRIs. Finally a neurologist told him to stop drinking diet soda and his tinnitus disappeared within a week.

I hope this helps.