Who can’t hear when a door or window opens in their house? Or when their security alarm goes off? Cocoon is a smarthome security device that uses infrasonic sound to detect an intruder

There are plenty of microphone-equipped DIY security cameras, but only some actively listen for ambient noise and alert you when it’s detected – and even fewer are equipped with specialty sound sensors.

But Cocoon, a cute little home security camera that recently kicked off an Indiegogo campaign, has a feature called “Subsound Technology.”

Basically, this is Cocoon’s way of saying that it can pick up on infrasound – sound so low in frequency that the human ear can’t typically hear it.

This level of audio detection can travel beyond physical sound barriers so Cocoon can supposedly sniff out something fishy even if it’s in a different room or more impressively, on another floor.

That also means that you might not need multiple Cocoons (even in a larger home), since it’s designed to cover more ground than a traditional sound sensor.

Think of Cocoon as a guard dog (dogs are known for their ability to hear ultrasound, or sound frequencies above 20,000 Hz, while infrasound is below 20 Hz but you get the idea); one that can send you a push notification and an email whenever something seems amiss.

And of course, it can also detect run-of-the-mill sound frequencies too.