Ron, aids normally require decent headphones to properly test loss. You were testing both ears at once. Um Bongo was, I think, was discussing using the better situation using a headset. A cheap setup might not even reproduce the tone properly.
Sound has a lot going on. speakers can reproduce sounds to maximums that are unique to each frequency cluster. There is a lot of adjustment in the lower frequencies. As they get higher the amount of amplification decreases and often can go to a volume that compensates for one’s loss.
Manufacturers may claim a higher frequency but the aid itself might not provide a damaged ear enough volume to mean anything. Trax42 has a phone program that is above human hearing and works with most phones but that’s with greater battery power.
That’s my amateur take on it; what Um Bongo is a graduate audio engineer. You can bank what he says – especially compared to me. Although any written reply can seem ambiguous to the reader. That goes for all of us.
You’re ignoring this member’s posts.