According to LRT, a Lithuanian startup has built an acoustic detection network by enlisting smartphone volunteers. The initiative, Drone Rada, asks participants to place idle Android devices in windows where an app listens continuously for the low-frequency engine signatures of Shahed drones—the Iranian unmanned weapons used over Ukraine. When sensors in the same area register an identical acoustic pattern, the system triangulates the drone's position and updates a public map. The operation involves twenty specialists and aims to recruit ten thousand volunteers across the Baltic states and Poland. Future iterations could incorporate surveillance camera audio and tower-mounted telecom sensors. Founder Audrius Zujus emphasizes privacy-first design: the system identifies threats using minimal personal data, turning distributed consumer hardware into a shared early-warning layer for regional defense.

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