Oh, it is proven fact that as you get older, you're unable to hear higher pitches. There are so many external factors that influence it though. For example, people exposed to a lot of high decibel frequencies and loud noises are more likely to lose the ability to hear high pitches earlier in life than those that aren't.

Tis why we keep getting gently reminded that we should wear earplugs for band nights and the pit band gigs. A musician's hearing is precious, obviously.

But yes, I can hear it too. You oldies just must have good ears :3