This sort of injury, with the missing sensory input, triggers brain plasticity. A lot of relearning goes on very quickly. It took only a few days until voices stopped sounding like chipmunks because I could not hear the low frequencies. I still couldn't hear them but I was starting to associate the new inputs with my memories of how I remember speech sounding. If I knew the person the voice was strongly gendered as male or female - with new speakers I had trouble guessing their sex. I still do.
From what little is known about this, exposure to sound is crucial during this phase. And a lot of people find it highly distressing. I was gripping my hands like in a panic/stress reaction when out in public in noisy environments. It is, paradoxically considering the quasi-deafness, a kind of sensory overload. Sounds I couldn't identify, coming from the wrong direction, with human voices sounding like garbled squeaks. A common reaction is to withdraw. But this almost certainly prevents relearning during the crucial phase of plasticity. I wish I had forced myself to go to more restaurants etc. immediately after, in hindsight. I suspect it may have resulted in less tinnitus long-term if I had done so.
This is so little studied it surprised me how little is out there when I went researching on what the best conditions to expose myself to after. I kind of had to make up a protocol myself.