If you make your jaw rigid it makes a ringing sound, it is like what I am experiencing lately with my hearing. I am not really wondering what is the cause because I had been 16 years in dialysis with a lot of complications and medicines that I took already that it just caused my hearing sense to get such a bothersome impairment like this "ringing ear" that I got now.
That is why I like having an electric fan always turned on despite it is cold because its humming sound masks my ringing ear. I do not believe that this will improve because I know that hearing impairments are just aided and not cured, but who knows maybe my hearing will get solved by another miracle down the road of my life.
Some medicines like aspirin and NSAIDs cause "tinnitus", this kind of hearing impairment and ulcers, but I do not use them anymore because I just have used them for pains that I could not tolerate. I am just hoping that this is just a transient condition and will get some kind of improvement in the future.
When there is an electricity cut-off at night my ringing hearing just gets a profound magnification because of silence and nothing to mask it like a constant humming sound from my electric fan. So I do not get a good night of sleep that way. Fortunately brown-outs are rare to occur in my province otherwise I couldn't live well with a constant bothersome ringing ear that has nothing to mask it off at least.