yes, it’s called ‘your brain which you trained A LOT’
To add on Raudrive’s explanation:
Some folks can train their brain with hearing aids, however, that works only if your cochlea is alive and kicking without dead regions (or better said - if amplification of sound works).
For those who have dead regions (I suspect that for myself, but couldn’t get test to confirm it, not available wherever I asked for it), no amount of amplification can give us sounds we litteraly don’t hear anymore.
That’s where CI implant steps in - it effectively skips the original hair cells and stimulates the nerve.
Depending on how long ago was the last time that your nerve actually received some comphrensible information, your CI implant success will be greater (ideally you didn’t wait with CI implants for decades and left nerve unused).
That being said, what everyone with difficult hearing losses struggle is comprehension in noise. That again can be helped by training, however, additional help is godsend (like tech gadgets that have better noise suppresion). But those current gadgets might not be good enough for what your brain needs.
Not all brains are made equal, some people have better filtering capabilites than others, so even same hearing aid on same audiogram and same setup might end with one people doing just fine and another struggling a lot.
But rehabilitation for both aids, HA and CI is really really important, and often people aren’t aware of how useful it is.
Granted, for many cases rehab with HAs happens naturally - you start listening and that’s enough on its own.
However, if you have more tricky situation, then you really need to intentionally train. Train isn’t complicated - it’s about intentionally listening, focusing, even repeating out loud, then varying degrees of difficulties (like adding noise, lowering volume etc).
Same with CI, except it might start even further back, when you need some time for brain to redjust for recognising some noises since it didn’t hear it for so long.
Also, about sound awareness only that helps with orientation and lip reading, that’s brain stem implant - for those whose auditory nerve isn’t working at all.
CI implant definitely enables speech comprehension
In quiet.
In noise, current tech still struggles.
Same with brain stem - it’s status of current tech, maybe in a decade it’ll give also speech comprehension.