New Sound, Can't Mask It?

I've been having a new sound today and it's preventing me from sleeping. it's very high pitched, higher than anything I've heard before. I would say it's at about 8000. What sounds do you use to mask it? links would be helpful, thanks. I have work in the morning and I can't afford to be tired.

 

Try this!

Boeing 777-300 Cabin Sound 11.5 hours....

 

Check out mynoise.net, select water stream and then move the sliders on the right up. See if that helps. Also you can get hearing aids that go up to 12khz and have the audiologist program masking in the 8 khz range or possibly the 8 khz hearing aids would work too. That is if it gets real bad.