I have tinnitus too, high tone, binaural. If you haven't done already, have a look at
www.tinnitus.org , the site of Dr Jonathen Hazell and Pawell Jastreboff. There's a lot of good information and advice there, plus some sounds which can be downloaded to help with masking the sound. There's also info about the technique of habituation, whereby breaking the link to the natural conditioned response to tinnitus (usually, distress, frustration, annoyance, etc.) - in other words, the sound is still there, but the conscious brain is either not aware of it, or it is not an annoyance any more.
I have found using sound enrichment overnite works well - either using a CD player or a tinnitus pillow.
Jim