Programs for "audio surveillance". Are there systems similar to video surveillance?

Question

Audio

Greetings!
Due to the need for service, there was a need for software for "audio surveillance", similar to video surveillance systems, the program should perform cyclic recording (let's say 100GB is allocated for the archive, erase old recordings when the volume is filled) and be able to work on detection, well, as in conventional video surveillance systems.
Can anyone come across something similar?

Answer 1

As well as video surveillance.
Buy a DVR, plug microphones into it, attach microphones to the "video" channels, start recording)

Answer 2

This is called a conversation recorder. Hardware pieces (ready-made solution) - for example, Gradient-12CH (8). Several channels, you can set the thresholds, access via ethernet, a listening program for Windows.
There are also purely software solutions, but I don’t remember right off the bat.
You can start studying the issue from this article .