Now that Airbnb bans any cameras in apartments, even if they are in an entrance room, which I had, the question arises of noise monitoring/prevent party/etc.
Airbnb authorizes, and even collaborates with, companies that provide noise sensors like Minut. However, this requires an additional subscription... this is not an option for many people renting with airbnb occasionally.
I would like to know if it is possible to buy a noise sensor without a subscription, and working without cloud services, such as using a Raspberry PI, or can use a third-party server. Or even to create your own noise sensor/detector ?