Aaand version 0.4, I guess? 0.3.5? Anyways, I made a vest to hold the sound processor and battery pack and wow, did it make a difference. Shoulder-mounted hearing aid-- who knew? Directionality isn't perfect, but it's a hell of a lot better, and wow, did it make a difference.

Anyways, I put in an order for a small 3.5 mm mic-- hopefully it shows up and basically 'just works' once I switch the audio input in the code. I suspect I might need to do some faaancy stuff to compensate for the mic's sensitivity range, but I'll burn that bridge when I come to it.

So far, this whole thing (aside from the Tympan board) has been really inexpensive-- maybe $30 in electronics-- for a functioning hearing device. Programming the prescription is still kind of a beast, involving some spreadsheets and a little guesswork. If we can get the board cost down, though, and improve the documentation/build process this thing might actually be accessible! I imagine I'll see some cost increases once I add nicer microphones, but it's hard to say. Feeling pretty excited. :)