I know it's potentially a bit off topic, but I started testing a hearing aid yesterday. I'd had a pretty substantial fear that they would aggravate my hyperacusis, but to my stunning surprise they did the opposite. Immediately after putting them in, the loudness/pain from my own and other peoples voices was significantly reduced! It has been an amazing relief. Also, listening to music is much more enjoyable again and my tinnitus is way less reactive to it!
And the even crazier thing is that after I take them out, the reduced hyperacusis seems to be enduring, as if the hearing aids have been reconditioning my brain. I've woken up two days in a row now with maybe a 40-50% reduction in hyperacusis. This is crazy.
Anyone with hyperacusis and the possibility to try a hearing aid should definitely give it a shot!