This is a slightly edited version of a message I sent to someone and I felt it’s worth others reading as well:
About a week or so ago I switched from running only the ultrasonic versions of the subs to strictly the masked versions. I was running the ultrasonic versions because I am quite a bit deaf in my left ear and I read somewhere a couple of years ago that ultrasonic versions work better for folks with hearing problems.
I’m beginning to think that running only those for so long may have hindered my growth because since switching to only masked and now running RICH as well there are whole moments I feel like an entirely different person. It’s literally down right frightening but in a great way.