An automated hi-tech surveillance network being built on the Greek-Turkish border aiming at detecting migrants early and deterring them from crossing, with river and land patrols using searchlights and long-range acoustic devices.

Greek border police are firing bursts of deafening noise from an armored truck over the frontier into Turkey. Mounted on the vehicle, the long-range acoustic device, or “sound cannon,” is the size of a small TV set but can match the volume of a jet engine. It’s part of a vast array of physical and experimental new digital barriers being installed and tested during the quiet months of the coronavirus pandemic at the 200-kilometer (125-mile) Greek border with Turkey to stop people entering the European Union illegally.

Nearby observation towers are being fitted with long-range cameras, night vision, and multiple sensors. The data will be sent to control centers to flag suspicious movement using artificial intelligence analysis. “We will have a clear ‘pre-border’ picture of what’s happening,” Police Maj. Dimonsthenis Kamargios, head of the region’s border guard authority, told the Associated Press.

AI-powered lie detectors and virtual border-guard interview bots have been piloted, as well as efforts to integrate satellite data with footage from drones on land, air, sea and underwater. Palm scanners record the unique vein pattern in a person’s hand to use as a biometric identifier, and the makers of live camera reconstruction technology promise to erase foliage virtually, exposing people hiding near border areas.