I like the baby monitor idea, and we have about a dozen of them.
The problem with that is they can be picked up on police scanners. Unless they've changed in the last few years, that is. I used to hear them a few years ago when i kept my scanner on a lot.
Yes. I’d like to hear how some of the people using them actually deployed them (outside on the porch, for example, or just near the door on the inside).
I guess the thing to do would be to try out various configurations for whatever app you are wanting the monitor for. Have someone go up to your back door and see if and what you hear and what adjustments you need to make.
Don’t they make baby monitors that also have a light that flashes when it detects a certain level of sound?