> I have no idea if other people have this kind of permanent beep as well, because I never asked anyone.

We do. I've had tinnitus all my life, or at least I can remember it as far back as about four years old or so. It sounds to me like the whine of an old CRT. I thought it was just normal until I learned it wasn't. I used to think as a kid that it was what the Simon and Garfunkel song "The Sound of Silence" was talking about. Luckily for me it's just something that's always been, so it doesn't really bother me. I have no idea what it would be like to not actually hear anything at all. The one time I was in a sound isolation chamber, it just made my tinnitus scream.

My neighbor developed tinnitus later in his life and it drives him crazy. I definitely feel bad for him, and others who are similarly afflicted by it.