@i.m
1) Is your T continuous, or only when you contract certain muscles, or do certain moves with your jaw or neck?
Regarding your question is think the same as Zora, that acceptance has to come first, to be followed by habituation.
Acceptance means, as I understand it at least, not to be upset/angry with your T anymore, to accept it to dwell in your head/ears, to not wish to kick it out of your head, to not think about methods to silence it anymore.
Habituation means, as I understood it, to get to a state when you are no longer aware that T is in your head/ears, and to hear it only when you listen and look for your T. In the same way that we get habituated to the sound of the fridge, or of a wall clock, that we can hear only from time to time, after which we become again oblivious to it, we do not notice it anymore.
They both come after a shorter or longer period of time, for other people in a few months or sooner, for some people ..it doesn't.
I think that the allegation that the possiblity to habituate does not depend on the severity of T, whether it is intrusive or not, small or screaming, constant or with spikes, is BS and an offence to the poor sufferers with severe T.
When your T is very loud, intrusive, you can not explain the habituation giving the example of the sound of the fridge, or a clock, or the outside traffic, etc, because with severe T the only sound you could compare it to is an fire alarm, which is a sound the cannot fall into oblivion, otherwise it would not serve its purpose and it would be replaced with another sound that cannot fall into oblivion. There are such sounds, in our heads, as T sounds, or in nature, or artificially made.
2) How loud is your T?