All the negative comments about the impact of hearing aids on listening acuity and how aging ears are inferior to young ones overlook the fact that the way our brain and ears function is adaptable and we can develop capacity to compensate for shortcomings in frequency response. I would urge anyone interested to view Paul McGowan's perspective on the matter. In addition to what Paul mentions, I have read many times of how aging conductors may have diminished hearing capacity but yet their abilities to discern what is happening in the orchestra remain as acute as ever because of the brains ability to compensate for hearing losses. Poll a group of audiophiles with "excellent" measured hearing at an audio show and there isn't going to be unanimity about what sounds best because there's much more to hearing than having an auditory system with a sixteen year old's frequency response.
http://https//www.youtube.com/watch?v=f4-Mo5yHuZY
http://https//www.youtube.com/watch?v=f4-Mo5yHuZY