Maybe I'm missing something. If I enjoy live music as it sounds, then this will sound different just because my live hearing isn't "right"?
My thinking exactly!
How do you define a perfect ear canal?
How risky is that for encouraging more hearing loss in a range?
I would say, zero risk. The headphones can only detect and correct for conductive problems. From the product description, it appears to have no way to detect or correct problems in the cochlea. Meaning, if you have industrial hearing loss, the headphones will neither detect nor correct it. And if it does not attempt to correct it, it won't exacerbate it.
Back when I was in medical school, frequency dependent hearing loss was measured the old-fashioned way. A technician plays you a frequency and gradually increases the volume where you say "yes" when you hear it. The level is then recorded, and the technician moves on to the next frequency. I do not know if they have a more modern way of doing it, e.g. by using electrodes to detect outbound impulses from the 8th cranial nerve (i.e. the nerve that carries signal from your cochlea to your brain). But whatever it is, this system does not appear to take into account its effect. For them to do that, they would have to play you sine wave tones at an increasing frequency and you press a button when it becomes audible to you. Doesn't seem too difficult to implement, probably a few lines of code into their app would do that. But they probably omitted it for reasons of simplicity.
Otherwise, these headphones would be a great substitute for a hearing aid.
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