Police are telling ShotSpotter to alter evidence from gunshot-detecting AI

Re:Police are telling ShotSpotter to alter evidence from gun... by gmueckl on Monday July 26, 2021 @01:19PM (#27962141)

I m not convinced that simple triangulation works in a city environment. Sound reflected off of buildings can mess things up good. I can think of several ways in which a later reflection can be louder than the initial sound.

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Re:Police are telling ShotSpotter to alter evidence from gun... by bob1029 on Monday July 26, 2021 @04:14PM (#27964804)

Triangluation works in these cases if you apply some DSP tricks (marketed in this case as AI).

Multipath interference can be mitigated to a large extent with multiple listening devices calibrated against a known acoustic impulse - i.e. intentionally firing something like a gun at a precise time & location known to the system beforehand.

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