[edgyswingset]

Somewhat related, but there was a very good talk at MLConf 2017 about using sound to catch illegal logging in the Amazon. Similar premise: collect the sound, analyze the patterns, and classify.

[jlg23]

Thanks for the pointer, found the video: https://www.youtube.com/watch?v=VlQyudLKJno

[posterboy]

likewise microphones in cities to detect gunshots