You are talking about a device of smart phone complexity. You need enough compute power to run a model that can distinguish noises. You need a TCP/IP stack an

You are talking about a device of smart phone complexity. You need enough compute power to run a model that can distinguish noises. You need a TCP/IP stack and a wireless radio to communicate the information. At that point you have a smart phone. A simple sound threshold device would have too many false positives/negatives to be useful.