Had my hearing tested for my recent 70th Birthday (70 is the new 50).
Tell you what, the frequencies were presented (via headphones) SO LOW (25 db?) they were barely discernable. From my own experience, I’d say the test was invalid. I can hear triangles at the back of the stage, musicians turning their music pages, audience members sniffing and coughing (when listening at normal levels), etc.. I can hold my arm straight out, rub my fingers lightly together and hear it plainly. The technician said I had a 6khz cutoff. At normal levels, I disagree.
BTW, this testing center also sold hearing aids. Couldn’t have anything to do with it, right?