The Drone Detector from the Orelia/Squarehead Technologies consortium uses acoustic detection to detect electrical drones, including those without radio frequency links (when on auto-pilot) and that are invisible to radar. It can create a sensing barrier via a network of sensors to protect perimeters from unwanted drones. All monitors are plug-and-play and are centrally controlled on a single management platform. Detected unwanted drones can then be stopped by firing a jammer, as each sensor can be used as a jammer/spoofer controller. Applications include cyber intrusions, personal property and infrastructure such as prisons.