Ok, so I've been doing some research trying to find something like an audio MCU\DSP with a built in audio filter; for instance, something that I could manipulate audio with to get a final filtered output. So if I put audio through it, maybe the output will only be 5khz+, and 5khz- will be completely cut.
Basically, I'm going deaf in one ear (I had brain surgery to remove a tumor like 8 years ago, and the nerve is slowly dying continually taking more and more high tones with it), and insurance won't pay for a hearing aid to help boost the frequencies I'm losing back up to more normal levels. This all sucks too because I'm a musician with a very huge background in audio engineering.
Bottom line: I'm going to build my own hearing aid that does exactly what I need and want it to do. But I'm a little lost where to start and what IC's to get that will allow me to manipulate and filter the audio easily. I found one through TI, but I'm still looking into it. Plus size; it needs to be tiny. Thoughts?