I'm afraid you'll probably never habituated. It almost sounds like you don't want too. I definitely brainwashed myself. You almost use the phase as an insult. But I've brainwashed myself, and because of this I can enjoy reading a book, riding a bike or taking a walk because I brainwashed myself. And trust me my tinnitus is high pitched and as loud as a train.
I'm glad that you have the ability to do that. Before continuing, I want you to know that I do not use the verb "brainwash" as an insult. I use it because, like
@linearb said, it is just a word that gets my point across. Everyone out there believes some things that may be untrue, or brainwash themselves into altering their perception of reality, making it easier to deal with. I will use religion as an example as to why I cannot brainwash myself into doing anything at all.
The problem with me is that I cannot experience the world in any manner other than how it is, objectively. I can't alter my perception of the world through thought - I never really had an imagination (but this doesn't mean I'm boring.) I'm physically incapable of fooling myself into doing or believing anything blindly. I'm a purely objective person - my parents tell me that, basically from birth, I was a VERY stubborn, quiet, introspective, and rational kid. I spent a lot of time in silence by myself, reading. If I found something to be untrue, I would remove it from my life instantly. For instance, I went to a Catholic school as a kid and attended Sunday School for years. Some 90% of the people I know from that period of my life were eventually confirmed as members of the church. I never cared for their beliefs, even as a young child. I was able to recognize it as baseless dogma RIGHT out of the gate. However, I always look at the other side of the story before making a decision.
I'm a compulsive researcher. It took me 5 minutes on Google one Saturday night to quickly and resolutely renounce what little faith I had - which shocked my father terribly. I violently refused to be confirmed into the Catholic faith out of the blue - suffering punishment after punishment - but I didn't care, because I refused to let him believe I had been brainwashed into believing that a book written by various human beings thousands of years ago detailing how an invisible man in the sky watches everything you do and will reward you for being a "good boy" is true, without proof. I did not want to have my name in the books of the church - to be labeled as another member of their dogmatic legion. I'm agnostic now, I just await proof that religion has a factual basis. If someone gives me God's phone number, I will immediately make my way to the nearest church.
Conversely, I
always notice when there is a problem. As a faithless individual (faith (noun) - "complete trust or confidence in someone or something."), I can never turn a blind eye to any aspect of reality - especially the uglier parts of life, and
especially when someone else tells me to try to ignore or accept something. My modus operandi gives people a reason to believe that I am "anxious" (anxiety is a
normal and common human emotion, mind you) despite the fact that I never exhibit any signs of an anxiety disorder. My pulse won't even increase when I'm in danger or injured. The only time in my life that I had a panic attack was when I was locked in a mental asylum like a caged animal, hopped up on drugs against my will, and unable to leave of my own volition. Despite the fact that I am in agony every day, it never drives me to panic - it drives me to
think. I think only about how I can make my body healthier - because my
body is the source of the problem, not my mind. No matter how I "feel" or "think" about my tinnitus, it will remain exactly as bad as it is without some sort of real treatment.
I hope this exposition details my personality and belief systems well enough to warrant you kind folks understanding my thought process.
I
was an intensely inwardly-focused, driven individual. There was no problem I couldn't solve. I never missed any little detail at all, no matter what I was doing. I could be watching a TV show, and the first thing I'd notice was the weird facial expression of some support character off in the background, rather than the actual dialogue. My brain is anatomically hardwired to notice any and all of the little details of life - my father is much like me. This behavior is a genetic trait. My few friends often compare my manner of thinking to that of Dwight Schrute, from The Office. Just the other day, my friend said that I was the most jaded person he had ever met. It's very easy to be constantly bored and fearless in the face of danger when you intimately know what true pain is.
I have an immutable set of beliefs, personality traits, and desires. It should be easy to see that, being mentally wired as I am, there is no way to accommodate for tinnitus.