You all should consult a doctor and get an accurate survey of your hearing deficiencies. It 's not just the volume that's reduced. With my ears, e.g. there is a loss of 20-30% in the perception of high frequencies that makes it difficult to understand spoken language as I do not hear certain consonants any more, like "s" or "f", and no longer hear the overtones or the rings of cymbals etc. I know the music and what I do not hear anymore! At least without a hearing aid.
Gheorge - try a hearing aid - you might hear things you never heard before, like the ring of cymbals that you miss on recordings (although I agree with you that drums are too low in volume on most recordings). You simply cannot feel high frequencies in your body!
Hearing deficiencies develop slowly and you get used to them without noticing what you do not hear when you first hear a new recording. I thought my speakers were getting old until I got my hearing aid and all the treble was still there - I just couldn't hear it as well as before.