With such a collapsed tolerance to normal environmental sounds...
Though hyperacusis can come in many forms from profound to very severe to mild
and very mild....
The beginning stage to the end stage....
Though in regaining ones tolerances back overtime...
Does not allways bring a person back....
To where they were before the H happened to them...
There is no cure..... Just a regaining back.... desensitization...
and not everybody can improve the same or get well overtime..
Though lots do get better.....
And in the recovery process as well....
It can change and vary.......
Expecially with building up ones tolerances to normal environmental sounds...
And the sounds of this world over time..
But with the whole word set on Hi...
Expecially with a very collapsed level of tolerances....
I was reading the teenager cartoon Zits by Jerry Scott and Jim Borgman..
And imagine this.......
They had a band practice going strong..
And the Dad asked the Mom how was your nap???
She said not bad really that she used Foam Rubber Earplugs, Cancelling Headphones,
and buried her head under half a dozen pillows..
And she said she didn't know if she went to sleep or just passed out from a lack of oxygen..

So Classic Hyperacusis is like..
And I would not recommend doing all that either...
Though people with hyperacusis disorder depending on their level of tolerances..
Do use earplugs and cancelling headphones and try to hide from the world under pillows..
It's very hard to hide from all the world depending on ones tolerance level of H...
But it's like useing all of that and still hearing the band playing......
At it's worse.....
Even without a band .....
As the outer world is the band......
And it's very hard to shut it all out......
Though we try ....
Or not useing any of that sound protection and hearing the band going real strong...
Everything can be heard super duper loud in the world....
Thats how it is liveing in the world with a severe collapsed tolerance to sounds..
The volume control knob is stuck on HI........
Untill the knob slowly comes down if one regains their toleraces back..
Overtime....
And thats the goal but not the cure....