At almost 49, I have some notch in my audiogram around 4KHz, no problem in real life so far: hear all conversations, even in noisy environments, hear hi hats in context, the birds peeping and most stuff at normal levels, including TV at the exacerbating low volumes that my wife loves to set. That being being said, I normally setup some eq in my phone like a couple of dbs up from 3 to 4 KHz and I like it more.
Beyond 13Khz I do not hear much, but somewhere I read from 50 yo or so is normal not to hear beyond 12Khz.
I do have tinnitus, due a long lasting issue with my new muscles.