That's what it sounds like all day all night - a cicada bug noise, or maybe a tree frog. If you concentrate on it, it can drive you crazy. The doctor says there is no wax and the ears looks fine. Check the word "tinnitus" in a search engine of your choice. And whatever you do, wear those ear muffs when you do noisy work, although I have worn them for years too. It's been about 3 weeks now. Will it ever stop? Who knows! I can't hear it when I'm in the shower. I guess my specialty will be making those mood tapes - and everyone will have running water in the background. If anything happens that can help anyone else, I'll let you know. Take care of your ears!
CB