Yes I have this too, I kinda class it as I have three ts , ones a high pitch ring in my left ear and the other is a hiss in my right and above that that's in my head is a low tone hiss that can drown both the other noise and be the loudest thing ever. But that's in my head, I have suffered labrinthist (can't spell) since September and I have a nasty virus that pretty much taken me down badly, I suffer other health issues so doesn't help, but I'm coping fine with the t even though it's so loud and no one will give me any real answers or even see a speacilst to work out what's going on. But I've learnt to deal with it by just keeping busy and cbt has help to refocuse this noise in my head.