Beeping and Dripping sounds

I haven’t really seen this mentioned yet which kind of surprises me. The dripping sound Mari was convinced she kept hearing in season 2 has come back, and now it’s actually audible to us as viewers. I have personally noticed the sound multiple times during scenes that feature adult Tai, I am beginning to think maybe they are some kind of a warning that Other Tai is present and in charge. There is also a strange beeping sound that seems to keep popping up in the teen timeline. The only way I can describe how it sounds is that it sounds like a piece of medical equipment, like the noise a heart monitor makes when it’s actively tracking your heart rate. Once you hear the noise you can’t mistake it. I first noticed it myself (someone else initially pointed it out) in episode 4 when the group is getting back to camp after finding Coach, specifically when we see Travis notice the group walking into camp. Why would we be hearing this strange sound when we are being shown scenes of the teen timeline? It just doesn’t make sense and add up. Has anyone else noticed these instances?