๐ฐ๏ธ Drone Sentinel โ The World’s First Acoustic Early-Warning System for Silent Fiber Drones ๐ฏ Detect What RF Canโt. Hear What You Canโt See. Get a Head Start. ๐ What Is Drone Sentinel? Drone Sentinel is the first-ever acoustic detection unit designed to spot fiber-controlled drones โ the stealthiest drones in the sky. Unlike traditional…