why subs ultrasonic not infrasonic? (or normal sonic)

[Shannon]

I really like the idea of 4 hours use or so a day because it's a challenge trying to keep up 12 hours sometimes especially between stages as I have to sit there on my computer.. which of course i'm doing stuff at the same time and i'm willing to invest that time but less hours with more effectiveness would be awesome.

At this time, I believe that for most people, 4 hours a day of continuous exposure would be way too much of 6G. I may end up producing it with 30 minutes of audio and 30 minutes of silence, or 60/60. It may be that that allows for a balanced effect and longer usage; that's what I'm hoping. At that point, it might be possible to use it 4 or maybe more hours a day without overdoing it. But I don't know yet; I have not gotten that far into testing variants yet.

If I cannot find a way to balance it otherwise, it looks like it will probably be 1-3 hours of use per day. From what I have seen, there is the potential for it to do really well within that range of usage time per day. More testing is, of course, needed.