Say I wanted to make my own Hearing Aid, A digital one at that. Say I had the DSP that did everything a High End Belton, High End Siemens, Starkey, or WIDEX.
Say the DSP is capable of, Multichannel 1, 2, 4, 6 or 8 WDRC compression with fully programmable crossover frequencies and time constants 16-band graphic EQ
Say it had, 32 kHz and 16 kHz sampling rate; 16kHz or 8kHz bandwidth
Lets throw in, 128-band Adaptive Noise Reduction ANR 3.2
Say, Real Ear hearing aid feedback path modeling
and lets not forget, 20-bit high quality audio precision
Now say I had a DSP with all those Features and So many more... For example; You pick your Favorite Digital Hearing Aid around $2K and Up Probably closer to the High end models, and this DSP might just have everything it list on that High end Aid.
OK, So you have a DSP and You have The DSP Programmer, you know to talk to the DSP the company might even know to tell you where to purchase such, or Hi-Pro or Noah link System and All the Software the DSP Needs to Program the Hearing instrument "DSP"
Now you have the DSP and the Stuff to link it to a PC, and you have the Audio-gram to tell the DSP what it needs to do for the person.
You have the Microphones, Front & Rear mics. Yes the DSP does 2 and a Telecoil.
You have the Receiver/Speaker.
Now Comes the Shell you need to put all of these Tiny parts inside it.
You've decided to go with CIC, for each ear. After talking to an Audiologist, he says yes you can use the CIC.
You have your In Ear Impressions...
Now comes a very difficult part. "I use Difficult very loosely"
How Do I Make a Shell... Well, I don't because it would cost more for me to buy the Acrylicast or Klarsil or something of the sort. All the other stuff I would need to make a Hollow Shell, "I would like VERY much to know how that is done though!"
So turns out what you thought was hard isn't at all, because you have the impressions of your Ears and as you know it there's only about 15-20 Companies that make Hearing Aid Shells for the 90-120 Hearing Aid Companies.
So you send off your Ear Impressions and they charge you a small fee to make the Shell for both ears they also make the battery doors and the Top plate, they bore a vent if you like and a Sound chamber also. The Door to the battery and the Plate are left unattached from the Hollow shell part. All for under $80
Now since you have all of theses parts and your very handy with a soldering gun even with very small parts you have knowledge of Electronics, you also have the Wiring Diagram to put it all together. All the software the Pros Use.
So let me get around to the Question already!
Why couldn't one do such if you had all of this stuff? What’s stopping someone from doing a DIY Hearing Aid??
Could this be done?