I also suffer from this. When my hearing was tested years ago the audiologist mentioned that my hearing was nearly perfect. He went on to explain when we are babies our hearing is, for sake of discussion, a "10" and as we age it diminishes and we get better at honing in on specific sounds.
To answer @Unicorn's question, I find it hard to hear people who are wearing a mask when they don't enunciate and don't speak loudly when in a loud setting. Yesterday I was ordering lunch and could barely hear the person taking my order because she was talking quietly while the restaurant was crowded and noisy. The manager, who was also wearing a mask, raised his voice so he could be heard.