Distributed passive sensing
for the expeditionary edge.
No emissions. No footprint. No cooperation from the target required.
47.4979° N, 19.0402° E · BUDAPEST · OPERATIONAL STATUS: DEVELOPMENT
REQUEST TECHNICAL BRIEF →An independent defence-technology company.
CF-Defense is a privately held Hungarian company developing distributed passive acoustic-seismic sensor networks for counter-UAS, border surveillance, and expeditionary perimeter protection.
The underlying sensor platform is dual-use. The same node deployed for military perimeter protection can monitor critical infrastructure — energy generation facilities, transmission infrastructure, ports, and industrial sites — providing acoustic anomaly detection without additional hardware.
We engage on a controlled-access basis with European defence agencies, NATO research programmes, and vetted integration partners.
We do not publish a product catalogue. Qualified parties may request a technical brief.
RANGE KPI
ACCURACY
AUTONOMY
Capabilities.
Passive C-UAS Detection
Distributed ground sensor nodes detect and classify aerial threats by acoustic signature alone. No emissions. Operational under jamming and active electronic warfare.
Expeditionary Perimeter Sensing
Single-person deployable nodes. No tools required. Under 15 minutes per node. Designed for temporary perimeter protection where fixed infrastructure does not exist.
Acoustic-Seismic Fusion
Combined acoustic and seismic processing detects aerial and ground threats — multirotor UAVs, fixed-wing platforms, vehicles, and dismounted personnel — from the same node.
Edge AI Inference
Full classification runs at the node. No cloud connectivity required. No raw audio leaves the device. Only compact detection metadata is transmitted.
SAPIENT & ATAK Integration
Native BSI Flex 335 output. Detections delivered to C2 via SAPIENT or published as Cursor-on-Target events into the TAK ecosystem. Human-on-the-Loop throughout.
Low-Cost Scalability
Target unit cost of €125–150 at production scale. Deploy a 10-node perimeter at a fraction of the cost of a single incumbent system.
ARGOS
PASSIVE ACOUSTIC-SEISMIC GROUND SENSOR NETWORK
ARGOS is a network of fully autonomous, solar-powered ground sensor nodes. Each node detects, classifies, and estimates the bearing of aerial and ground threats using a seven-element MEMS microphone array and a co-located seismic sensor.
Detection events are relayed over a low-power radio link to a fusion gateway, which delivers SAPIENT-compliant targeting cues to allied C2 systems.
The system emits no electromagnetic signature during standby. It operates in GPS-degraded and RF-denied environments. It requires no fixed infrastructure and no network connectivity at the node.
Operating principle.
An always-on microcontroller monitors the acoustic environment at under 5 mA. A cyclic audio buffer captures the preceding 10 seconds before any trigger event.
On detection, the primary compute module wakes and runs an edge AI classifier against buffered audio. Outputs: class, confidence, bearing. Inference under 20 ms.
A compact binary detection frame — bearing, class, confidence, timestamp — is transmitted over a low-power radio link. Under 20 bytes. No raw audio leaves the device.
The gateway delivers a SAPIENT BSI Flex 335 compliant message to the operator's C2. Detections appear on ATAK as georeferenced threat markers with class and confidence.
Technical specification.
| PARAMETER | VALUE |
|---|---|
| Detection range — multirotor class | 200 m KPI · 300 m target |
| Bearing accuracy | < 10° std dev |
| Classification outputs | Multirotor · Fixed-wing · Vehicle · Personnel · Background |
| Power | Solar + LiFePO4 · > 7 days no-solar |
| Enclosure | IP67/IP68 · −40 °C to +70 °C |
| Deployment | Single-person · no tools · < 15 min |
| C2 interface | SAPIENT BSI Flex 335 · ATAK / CoT |
| Operating mode | Fully passive · 24/7 |
| Operating environment | GPS-denied · RF-contested · no fixed infrastructure |
Performance figures are indicative. Validated data released to qualified parties on request.
Hardware architecture, component specifications, and integration details released to qualified parties on request.
Where ARGOS operates.
ARGOS is a passive early-warning and cueing layer — not a replacement for radar, RF, or optical systems. It covers the gap left by spectrum-based systems and remains effective under the conditions in which they fail.
| CAPABILITY | ARGOS | RADAR | RF DETECTION | OPTICAL |
|---|---|---|---|---|
| Passive — zero emissions | ✓ | — | — | ✓ |
| ECM / jamming resistance | ✓ | Partial | — | ✓ |
| RF-silent autonomous UAVs | ✓ | ✓ | — | ✓ |
| Night / all-weather | ✓ | ✓ | ✓ | — |
| Ground threat detection | ✓ | — | — | Partial |
| Expeditionary deployment | ✓ | — | — | Partial |
Contact.
Identify yourself, your organisation, and the nature of your enquiry. Vetted enquiries are routed to the appropriate programme lead within two business days.
hello@cogniforce.io REQUEST TECHNICAL BRIEF →COGNIFORCE
BUDAPEST, HUNGARY
EUROPEAN CAPITAL.
NATO EDGE.