We have also been looking at gun shot detection in a nature preserve in tropical rainforest. Our initial experiments have been looking at vectors of change in spectral centroid and Kurtosis and Amplitude. Initial trials used RP3's. I have not looked at the code or processor for the AudioMoth yet (still waiting for mine from the last round), but perhaps someone would know if there is sufficent DSP there to do such analysis? I did read in the paper above that you re doing continuous analysis using 3 buffers, so this peaked my interest in asking who else is looking at these challenges. We would hope to add event detection messaging using long range wireless developed for IoT applications so that gardians of the preserve could be alerted to poaching activity.

me to...