Steve, how often does this occur? Is it all the time or was it just occasionally? I've heard of things with Tinnitus being a little more permanent instead of the occasional ringing in the ears.
Magatsu, your comment hit something with him. While he doesn't suffer from food allergies (which is what I think you meant by grain), he does suffer from hayfever and other allergies. While its wintertime here so allergies aren't an issue, he pointed out that it hasn't happened outside recently but inside his house which could still contain pollen and therefore an allergy. You know when you feel your sinus drain. He says he doesn't get that feeling, but perhaps its small enough to not feel it but can do that to his ear. It would also explain why its in both ears.
On the other hand, he pointed out that he only notices it when its very very quiet with little to know background noise so its possible he wouldn't notice it outside to begin with...
