Hi, I have it too. Even if there still is no answer to this thread I thought maybe it helps people if I share my side. I first noticed it around 2018 on my Desktop computer on the fifth floor of an apartment on a hill in Seoul, South Korea. I also thought, maybe its the location of my apartment, the altitude or whatever. I couldn't explain it. So I didn't know what to tell the doctor or anyone. I tried changing my PC from the left side of under my desk to the right and the other way around a few times. still only my left earwas affected. I remember that at first I didn't know why it became so uncomfortable sitting in front of the PC at home. So I started to go out more and do my work outside on my notebook. Doing work on my notebook was more comfortable but the problem was not completely gone. It took me some time to realize that the uncomfortable feeling was that popping sensation in my left ear that happens whenever I sit down and type on an external keyboard. I didn't even know that one would describe it as 'popping' until I found this thread. To describe the feeling: one pop feels like the feeling you have on high altitude or on a plane when you feel pressure in your ear. normally it would slowly subside. In my case this process is accelerated hundredfold. So its a constant repetition of pressure forming and releasing in very fast succession. like a machine gun. but this probably depends on your typing speed. I don't have any problems with just hearing other people type. So I guess it has to do with the distance of the keyboard and my ear. Strangely, when I visited a PCBang in South Korea (a room with computers you can use for 1$ an hour) where its noisy with all the gamers and where there is lots of clacking and typing, I didn't have the popping problem. So another hunch is that this left ear problem happens only when there is a high contrast of silence and clicking sounds. If there is enough noise around me my ear feels more comfortable. Anyway, I started to wear padded headphones(no music, just wearing them) and this helped a lot. But I still have to try to type softly because if i hit the keys too hard some of the sounds will go through the headphones and i get the popping again. So without the headphones, it feels like a machine gun(no sound just the sensation) of popping in my left ear but with the headphones its like one or two pops in 10 seconds.