Mine is left ear dominant and seems to be around 8Khz. Think I've had it since a child, apparently when I was about 6 years old I was hit around the head with a heavy book by a teacher for talking in class and suffered badly with it afterwards, but I guess my brain managed to filter it out as I got older as I don't remember having a problem with it growing up. Then about 25 years ago we were having problems with a 'neighbour from hell' who liked to start playing loud music at random times during the night so I think my mind was listening out even when I was asleep, woke up one night with a loud whistling noise and had it ever since 😒. I get short bouts of silence every now and then, it actually happened a couple of weeks ago about 2am in the morning, woke up suddenly and felt a bit strange then realised the tinnitus had gone, so nice to be normal again if only for a very short time (ie 20 or 30 seconds)! Sadly it's always back by the next morning though.