I think that's most people. I never even knew that I had tinnitus (still don't know if I do frankly) because if you've put me in a dead silent room I've always heard some very low kind of 'static' for a lack of a better term. Most people I've ever talked to say the same thing, very few people have ever told me they hear absolutely nothing. Only after I kept reading about it did I start to notice it more, I think there's a really big psychological element to it.