Scientists turned a piece of ordinary-looking fabric into a "super-ear" that can hear drones from miles away.
This woven material contains over 1,000 sensors per square centimeter, allowing a simple tent or net to pinpoint a drone's location with extreme precision. It effectively turns a soldier's camouflage or a building's awning into a high-tech, radar-like sensor.
Acoustic Detection of Unmanned Aerial Systems via Piezoelectric Sensor Array Fabric
engrxiv · 6810
I present a theoretical framework for passive acoustic detection of unmanned aerial systems (UAS) using a woven piezoelectric sensor array fabric capable of integrating dense arrays of acoustic sensors at densities exceeding 1000/cm2 with embedded beamforming signal processing. I derive a master detection range equation incorporating source acoustic power, spherical spreading, atmospheric absorption (ISO 9613-1 [6]), ambient noise floor, array processing gain, and matched filter gain. For a 1 m2