I was scratching the outer portion of my ears with my nails quite gently, and happened to pass above the area where the vagus nerve innervates the outer ear. Afterwards I had some twitching in my ear, followed by some nausea, droning noises, and some hearing loss. I know the vagus nerve is partly responsible for allowing the eardrum to conduct sounds efficiently. This seems to be a good clue. Anyone else see changes in their tinnitus/hearing when stimulating the vagus nerve in that spot of the ear?