A recent pilot in Prague enabled Hosts on Airbnb to trial Minut noise sensors, and found a reminder can be all that’s needed for a potential noise issue to be quickly resolved

If a reminder is all that’s needed, the device could be an offline decibel meter that lights up when the volume exceeds a threshold.

Plus I’m sure parents are going to love their phone blowing up when little Billy is a bit too cranky at bed time.