Has anyone made a sound-only sensor?

… my use-case is to notify me via slack (or whatever) when baby is crying when im out of earshot. Ie when sound rises above certain threshold. I have a samsumg cam pointed at the crib but it’s difficult to tell when shes crying from that alone - this cam does have an audio stream, but no idea how to tap into that.

But TBH, a small IoT device dedicated for sound only appeals a little more i must say. I see ‘electronic bricks’ etc for under $10 but dont want to reinvent the wheel if i can help it. Im sure someone must have tackled this before… ?

Thanks brain trust!

Perhaps this blog post will help you.

Amazing! Thanks so much!