I was recently (and repeatedly ;)) pointed to these news.
My personal opinion is that I am sceptical, if this is really aimed to actually help the hearing impaired or if it is just one piece in the game of patents. Even if this will yield to actual products, it might certainly not make the market any more open (at least with apple’s history, that would surprise me). I hope we do not end up in a scenario where you can only use Apple products with Apple hearing aids.
But maybe I am wrong and Apple will surprise me. We will see. 🙂