system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why can’t we hear high frequency sounds as we age?

Why specifically do we lose HIGH frequency hearing as we age, and not low frequency?
gpt
Sound is fundamentally detected by "hair cells" in your inner ear, which have hairs suspended in fluid that move when the fluid is affected by an incoming sound. However, these cells die off as you age, so as you get fewer of them the sensitivity of your hearing goes down, with high frequencies being the first you notice.