article_snippet: Technology now in use by the New York Police Department may be picking up stray conversations.
article_snippet: Three hundred ShotSpotter microphones are being placed in high crime areas of the Bronx and Brooklyn, with the aim of alerting police immediately when police overhear the sound of gunshots.
article_snippet: However, the devices pick up more that just the bang of shots being fired in potential crimes, and evidence from conversations they've listened in on has been used in court.
article_snippet: its system works by sending a few seconds of audio to police departments along with location information after a potential gunshot system makes a potential gunshot system through a filtering process .
article_snippet: the devices are thought to help police respond more quickly and help authorities pin point the exact location of shootings after potential gunshot recordings are sent through the company's headquarters in California.
article_snippet: ShotSpotter says that ShotSpotter devices 'are specifically designed to be triggered by loud explosive or 'impuslive' sounds only.'
article_snippet: Three microphones must be triggered to start an alert and triangulate a location.
article_snippet: the company says that human voices, slamming car doors and loud music will not trigger the microphones, which then send summary data about a sound to the company.
article_snippet: The ShotSpotter system (above) filters out noises such as car door slams and yelling before sending alerts to the police .
article_snippet: It states that there is no 'live streaming' of any microphones apart from the few seconds of regular audio sent to It employees for further analysis about whether the sound may have been a firecracker or a gunshot.
article_snippet: An alert, location data and a few seconds of audio are then sent to local police.
article_snippet: The company use has revealed that the vast majority of verified gunshots Its use picks up are never reported to police.
highlights_snippet: ShotSpotter microphones detect gunshots and triangulate location .
  
highlights_snippet: Technology uses filtering process to eliminate car door slams and yelling .
  