Grumpy Old Geeks Topics School aggression detectors Topic School aggression detectors 2 mentions in 1 episode The speakers discuss microphones installed in schools to detect possible aggression and alert security. Mentions 357: Precious Little Dolphins Jun 29, 2019 55:18 Schools are actually installing these things called aggression detectors 57:17 This is a ProPublica article. And they've got tons of audio examples