I did a quick search but didn't find anything on the forum, which I guess makes sense as it's built in PD.
Basically I've been looking at the Xth Sense sensor:
Basically an electret microphone that you attach to your forearms.
Seems quite ingenious as that's a very cheap way to generate complex data.
Now the patch is written in PD, and I don't know PD at all, but I'm curious if anyone has come across this, or something like this, in terms of turning what I'm imagining is very quiet and complex audio into meaningful data (streams).