In practice I'm pretty sure it's more about exposure to loud noises than actual age, and these increase as you age. I know I was able to hear 20kHz at 16, but probably down to 17kHz or so now at 25.
In other words, if you've been to a couple of rock concerts with no earplugs then all bets are off.
Also worth noting that most speakers play 0.5dB below the actual signal at 20000Hz, where anything above that usually isn't specified. So you need specialist audio gear or some measuring equipment to actually try to listen to really high frequencies.
In other words, if you've been to a couple of rock concerts with no earplugs then all bets are off.
Also worth noting that most speakers play 0.5dB below the actual signal at 20000Hz, where anything above that usually isn't specified. So you need specialist audio gear or some measuring equipment to actually try to listen to really high frequencies.