Help in Interpreting GN Output Graph

I have the same question, and can’t find anyone that can explain it, which probably includes your audi - it’s a mystery, and I think there’s good information in there.

The red area at the bottom is the area that you can’t hear without hearing aids.

The top red line is the maximum output your HAs are able to deliver

The three red lines below are the output from your HA when it detects input levels of 50dB, 65dB, and 80dB. For example:

Bottom red line (50dB input): if the HAs detect a 50dB signal at 250Hz, they will amplify this to 60dB. A 50dB signal at 3KHz will be amplified to 85bB.

Third red line from the bottom (80dB input): if the HAs detect an 80dB signal at 3K, it will get amplified to 105dB.

The three dotted lines are what the fitting software originally suggested. Your audi modified this slightly, and you ended up with the red lines.

Why are some of the lines below the threshold? For example, If you look at the 80dB line (third red line from the bottom) it shows that an 80dB input signal gets amplified by only 5dB to about 85dB at 8KHz.
You listening threshold is at 90dB, so you still won’t hear it. However, a 90dB input signal would also be amplified and that would put it over the listening threshold. The graph simply doesn’t show this.