My hyperacusis was present immediately upon airbag explosion June 19th. I went back to work as a strength trainer and every closing door and dropping weight caused extreme pain in my ear/temple. Tinnitus onset came in the middle of the night on July 18–a distinct "eeeee" that woke me up from my sleep. Never got back to sleep, continued to try to work but was physically and mentally destroyed and quit on August 18th. Once I removed myself from loud environments, and made sure my dad was careful with closing doors—patio, microwave, back door, and careful with setting things down (e.g. coffee mugs, boxes, etc.) my hyperacusis started to improve.
Unfortunately once I got physically cleared to lift weights again, going back to the gym environment has made me backslide on hyperacusis and tinnitus. While the hyperacusis had reduced from an 8 or 9 to a 2 or 3 in the months between quitting and resuming lifting, it's gone back up to a 5 or 6 with some TTTS symptoms returning. The tinnitus went down from a 7 or 8 to a 4 or 5, then once I resumed lifting went back up to a 5-6, even with hearing protection. I'm going to have to quit lifting to give myself a chance at life again, it seems.
I definitely think hyperacusis improves way faster than tinnitus and is a contributing factor to making tinnitus worse.