Sonyfan, you\'re not alone. I know what you\'re talking about, I have the exact same thing and I\'ve had it for as long as I\'ve been alive. I hear it 24/7, it never stops. And JUST like you described, when there\'s ANY level of noise happening it goes away, but as soon as silence happens, it\'s back, the less noise surrounding me, the more intense it is, and it can get REALLY intense sometimes. So I know exactly what you\'re talking about, I have the very same thing happen to me. And I can also hear TV\'s just like you said.... I just thought it was all normal.
On to paranormal things... it\'s gonna sound weird but i\'ve predicted what will happen in the future some times. Only small things, but they really scare me. For instance, last year was my final year in high school, grade 12. We were sitting in assembly, (an assembly for our grade alone), and the principal was talking. He was known for just stopping when other people spoke, and if still they kept talking when he was silent, he said something about the noise. Well anyway, I had a really itchy shoulder, and was like, twitching it to scratch it... and in my head for some reason I got this image of him looking at me and saying "what\'s wrong with you???" even though it was totally uncharacteristic of him to say something like that.
About 5 mins past, and all of a sudden he stops... looks at a guy from my grade who was doing something and says "what\'s wrong with you???" in the EXACT pitch, tone, and delivery I imagined, it was SO weird. And that\'s no isolated incident... this happens a fair bit to me. I get deja vu a lot, sometimes for minutes on end. And when I do get deja vu, I actually imagine in my head what will happen in like a minutes time, and sure enough it happens. It\'s freaky.
On a side note, deja vu is actually described to be your brain slowing down. That is to say, what\'s actually happening is you see, hear and detect everything that happens in a given moment, but your brain doesn\'t fully process it till a split second later. When it\'s processed, you think you\'ve done it before because you\'ve "seen and done" it before, but when it stops and you\'re back "up to speed", it doesn\'t feel like you\'d done or seen that before. The reason of course is you hadn\'t. But I get this for extended periods of time, and predict what will happen in a minutes time. It\'s very weird.
(btw: I\'ll try and find a link to a scientific paper about deja vu)