Finally found this thread, Gerald pointed me at it, but I suppose I screwed up the URL before.
Sounds like we have very similar problems. My project is voice operated controls (TV, STB, AC, pager …) for a quadriplegic person. Gives them some freedom and caregivers (me :-)) a break. Could be a very nice option for others in similar situations.
Many of the same problems with an external mic. My problem doesn’t come from automotive issues, but rather room noise. People speaking, audio from TV / music.
I’ve accumulated a box of microphones with VERY little success.
Going to order parts for stuff mentioned above. Ada is out of that mic board, but they are plentiful on Amazon by other vendors.
Does anyone have recommendations for values of that attenuator circuit Gerald posted (R1,R2,C1) above. I’m a little leery of using the MOVI as a fuse :-).
Also issues with THRESHOLD, anything above 5 and it is stone deaf. I haven’t been using the internal mic so that may have something to do with that.
The main reason for the need of an external mic is that I can not have electrical stuff and wires spread on the bed. Mic needs to be mounted on the safety bar which is about a foot or so from the person talking.
Working with someone else here to see about being able to use a bluetooth headset which seems like it would be ideal, Using something like the motorola H730 (long battery life, noise canceling).
One of my MOVIs has a dead internal mic, thinking on what was said above, removing that, put in a jack and attach an electrit mic might be a plan too. Cable only has to run about three feet.
My biggest problem is time, doing caregiving 24/7 :-/. Working on this as I can.
Again, THANKS to all on this thread!!!