I’ll put my dollar on your square! My guess is it’s not a bad aid, just bad programming. I would be willing to go a step further and bet an additional dollar as to the fact that it has to do with the combination of NT II and DFS Ultra settings. There is some louder (while driving) ambient car/road noise that is being picked up (if I had to guess around 2k +/- 500Hz), considered voice, amplified to an extreme, then considered either not voice (and possibly even feedback), and this is oscillating (very quickly) back and forth.
If I’m right, there are many ways this can be addressed, but a simple test would be to disable (not lower, but disable) NT II and retest, or if you want to kill two birds with one stone, disable both NT II and DFS Ultra and retest. Again, these settings would be only for testing, I’m not suggesting that you leave the option(s) disabled as a way of fixing the problem.
Yes, when I go back. I will ask my Audi to disable both the option, go into my car, drive and come back to him and disable one and leave the other on. I really am not willing to disable these functions but for test purpose, it will be fine. Will see how it goes.
Until then, I am just taking the left HA out and keep the right HA on. I can’t stand that static noise in my left ear all the time while Iam driving.