http://sls.iykpqm7jiradoeezzkhj7c4b33g4hbgfwelht2evxxeicbpjy44c7ead.onion/technologies/gunshot-detection
As is so often the case with police surveillance technologies, a device initially deployed for one purpose (here, to detect gunshots) has been expanded to another purpose (to spy on conversations with sensitive microphones). For reasons such as these, as well as fiscal cost and community backlash, cities like Dayton, Ohio have canceled their contracts for acoustic gunshot detection.