About that getting older thing, it's true, but not entirely relevent, depending on the listener. You must consider the training and experience that the ears have received. Mario Andretti is over 60 and seldom drives competitively anymore, but he can still outdrive 99.9% of the male population of the western world. His nervous system is probably firing 30% slower than when he was 20, but his experience still leaves him in a different league than the rest of us humans.
Some of us have been playing musical instruments daily since we were ten or so and listening to "high end" stereos since we were in our late teens (decades ago) and we easily hear differences that others don't notice or can't isolate. So, like athletics, I think that listening is a skill that can be refined and honed with practice. Also, like certain skills, it helps to have started early in life and continued to develop over a period of decades.
Dave
Some of us have been playing musical instruments daily since we were ten or so and listening to "high end" stereos since we were in our late teens (decades ago) and we easily hear differences that others don't notice or can't isolate. So, like athletics, I think that listening is a skill that can be refined and honed with practice. Also, like certain skills, it helps to have started early in life and continued to develop over a period of decades.
Dave