[skybrian]

It might be interesting to do some experiments that audiologists don’t do. In particular, music recognition, like recognizing the difference between major and minor chords.

In addition to my normal hearing loss, I sometimes have trouble with this in one ear. Fortunately it has always gone away, so far.

I suspect that some amount of this is your brain adapting to changes in hearing. Perhaps there is some way to study how people adjust to wearing new hearing aids?