I once attended an inservice lecture for people who work with the deaf and the Dr lecturing said there are many types of deafness above a loss of volume. There is deafness to certain pitches, the inabilty to distinguish one noise among many, garbled noise which cannot translate the noise into something recognizable as examples. The three I mentioned don't necessarily mean the noise has to be louder, and in fact can make it worse. For myself, clearly hearing one voice with a lot of background noise is very hard. Unfortunately, getting a hearing aid that just amplifies noise can't help with these problems.
I have a similar vision problem in that given time to focus on something I can see it clearly, but focusing when I or the object I am looking at is moving is not so good.
Be safe and well...