This happened to me just this week, I was watching a video from Technology Connections (quite the amazing "Thing explainer" too), and he said "People heard this sound", and I was like "What are you talking about, I'm not hearing anything?" Then it dawned on me that my hearing started deteriorating already. And like you, hearing high frequencies was something I was secretly proud of.. I have no idea why. Bummed me out for quite a while, too..<br>Stay awesome, Tom Scott, stay awesome.,(reply>), And also, keep explaning things, Technology Connections.