If Earzz recognises the sound I want, then lock the Door using Kwikset lock

Create custom workflows effortlessly by selecting triggers, queries, and actions. With IFTTT, it's simple: “If this” trigger happens, “then that” action follows. Streamline tasks and save time with automated workflows that work for you.
55 triggers, queries, and actions
You can add delays, queries, and more actions in the next step!
From a knock at the door to a smoke alarm, Earzz alerts on your watches, phones and tablets for important sounds at home, no matter where you are!
Wireless Sensor Tag monitors and records motion events, temperature, humidity, ambient light, water leaks and can be used to find keys through beeps.