Soldato
Age is honestly a very small part when it comes to sound but sadly it's blamed on everything.
My father is 70 in a few days and still has perfect hearing.
You just need to get use to the sound.
Has the 650's colour been changed or is it just picture editing ?
I ask as I looked at the Sennheiser store page and noticed the 650 on there is much darker than on the amazon page where I bought it from.
The 2nd picture just looks over sharpened and toyed with. The older picture doesn't have the stock cable for some reason(All 650's have a fatter connector) Also the older picture has the black drivers which may have came with a a thinner cable at the time.
It depends on the context. You are right that old age doesn't automatically mean poor hearing, but when it comes to the hearing higher frequencies, age is very relevant. The older we get, the higher the frequencies we can hear gets less and less.
Rids57 hearing no higher than around 12k seems about right given his age. I'm 40 and I can hear around no more than somewhere between 13-14k, which roughly about right, but my hearing clearly isn't as good as the guy who is 46 in that group.
you must have bat DNA in your genes, hearing 21k at 38 is nowhere near normal.