The nuraphone - "Headphones that automatically learn and adapt to your unique hearing"
Here is the “How it works” https://us.nuraphone.com/pages/how-it-works
The nuraphone plays a range of tones into the ear, and then measures a very faint sound that your ear generates in response to these tones called the Otoacoustic Emission (OAE). This tiny signal originates in the cochlea and vibrates the ear drum, turning it into a speaker and playing sound back out of your ear. Yes our ears make sound! This sound is about 10,000 times smaller than the sound that went in.
Encoded in the returning sound wave is information about how well you heard the sound that went in. The nuraphone uses an extremely sensitive microphone to detect this returning sound wave, and a self learning engine built into the nuraphone to create your profile. No buttons or knobs. It all happens automatically and in about 60 seconds. It is a little bit magic.
Once the nuraphone has created your hearing profile it sonically moulds your music so that it matches your hearing system and delivers all the detail of the music you love. Once personalised you can listen to your favorite music in stunning detail from your favorite player.
It’s a really interesting concept, I’d love to try out a set of these because my ears a very sensitive but very damaged due to exposure to some seriously loud stuff.
What I don’t like is that the ear cups look too rubbery and they don’t sell any alternate versions.