Technology · Air and missile defense
Detecting and tracking drones from their acoustic signature and with camera-based computer vision, without emitting radar or RF energy.
Case for · why it matters
A sensor that emits nothing does not give away the position of the vehicle or unit it protects, and it still works against drones that are not radio-controlled.
Case against · the skeptic’s view
Acoustic and optical sensing has short range and degrades with noise, weather and occlusion; vendors' performance claims are largely unverified.
Fielded0
Limited fielding0
Prototype1
Development0
Research0
Concept0
Placed by each organization's own maturity for this technology; TRL is self-reported or estimated, see confidence.
About 23 kg counter-drone turret: acoustic detection cues an onboard visual tracker and a fast motion platform aims a 12-gauge shotgun at small drones 10-100 m away. Emits no RF.
Photo: U.S. Army photo by Spc. Ra Hetep · Public domain (PD-USGov-Military-Army)
Criticality is how much a shortage would constrain production; open an input for producers, concentration and trade controls.
The Defence Blog · Aug 23, 2026 · Supports Technology
“Because the system stays passive until it fires, it does not broadcast a signal an adversary could use to locate the vehicle first.”
9 Mothers · Supports Organization technology, Technology, Technology · technology input:edge-ai-compute
“Zero-RF, signature-quiet detection. Coarse tracking from intrinsic drone acoustics — feeds the rest of the kill chain.”
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