Traded up from Gen 2 SE to Gen 3 SE. Same absolutely silent environment. Passed fit test. Put phone on table. Did not press unless I was absolutely sure I heard a tone. Recognized maybe 25 tones. Periods where I heard nothing for a while. Still failed. BTW, I don't have any hearing problems, day to day. I am 72. However, in noisy environments, like a loud restaurant, when my family can hear fine, I can have trouble understanding sentences. I hear well in my left ear, right ear is slightly attenuated in upper range, per senior physical hearing test. (no, no chart was given me. I can use other Apps fine, and confirmed, but when I input their data, did not work either, despite accepting the input. Was hoping would allow me to hear better in noisy background. I tried Transparency mode. Don't have time to try other modes today. Pretty much expect to fail as it never made a difference before. I have been an Apple customer back from the original days. I have never been so disappointed in Apple, because the error it gives as to background noise is absolute rubbish. No real information to work with. Despite the room being in my basement, closed, insulated, no heater on, no fan, no nothing, even tried conventional headphone style headset, although there is no noise, so... . I have no other use for them, I have bluetooth in my car and a stereo at home. I can hear tv fine. Should work even if you only hear a few tones, just boost everything else. Serious problem when it wants to be so picky, just let it work with the results it gets! Basically, feature should not have been released without being able to provide decent information when there is a problem. Cleary sales were more important than support.