At one time, I could hear a sine wave up to 21 kHz. The last time I was tested, my hearing started to fall off at a little over 15 kHz. Maybe this is why I don't get all the cork-sniffing over strings, pickups, and fancy speaker cabinets. It could be why it makes it easier for me to be satisfied.
great point,... maybe if my hearing was better i could appreciate the subtle nuances every else seems to be drooling for. or maybe i'll channel my inner rockstar and buy a case of tubes and strings to up my "whatever it is"!???...