I have a project for uni, I want to be able to detect if a baby has stopped breathing from one point in the house away from the baby. This would prevent cot death and could have lots of uses. Maybe in the future it could be used as a smart phone app.
So my questions are
What mic or device could be used to hear very quite sound at a long distance? over 3m
What are some easy ways to relay this information to a phone or just to let the user know the babe has stopped breathing.