Passive acoustic detection at 0–5 km, sub-2-second AI classification, and instant operator alerting — no radar, no RF emissions, no electronic signature.


Traditional aerial detection systems require months of specialist training and a dedicated crew on-site around the clock. Peregrine flips that. Detection, classification, and operator alerting are handled autonomously — any security personnel is fully proficient after a 2–3 day field course. No permanent specialist needed.
A distributed array of passive microphones continuously monitors the acoustic environment. No radar. No RF emissions. No electronic signature. Low-altitude fixed-wing drones produce a distinct acoustic fingerprint detectable at up to 5 km in open terrain.
Raw audio is streamed to an on-edge inference engine trained on low-altitude drone and aerial object signatures. The classifier outputs object type, bearing, elevation, and confidence score. False-positive rate below 0.1% in field conditions.
Bearing, elevation, range, and threat classification are instantly relayed to the operator interface. Configurable alert thresholds and multi-channel notification ensure the right people are informed within seconds of detection.

Radar-based detection relies on electromagnetic emissions that can be identified, jammed, or spoofed. Passive acoustic detection emits nothing. It only listens.
Low-altitude fixed-wing drones use piston engines with characteristic acoustic signatures. Peregrine's multi-array passive sensor triangulates bearing and elevation using time-difference-of-arrival (TDOA) across a deployable sensor grid. The system operates continuously without any electronic emission profile.


Acoustic detection. AI classification. Visual confirmation.
Acoustic cue guides the aerial platform to visual range. Onboard IR thermal and low-light optical sensors provide positive visual confirmation — no GPS required.

LNG terminals, petrochemical plants, and power generation sites. Persistent acoustic monitoring provides early warning of aerial activity — giving operators maximum response time for high-value energy infrastructure.
Power grids, water treatment facilities, energy infrastructure, and port logistics. Fixed sensor arrays provide 24/7 acoustic coverage with sub-2-second detection, requiring no radar emissions that could reveal the sensor position.
Rapidly deployable sensor nodes configured in under 10 minutes. Provides a passive acoustic detection perimeter for remote installations, construction sites, and temporary facilities requiring discreet aerial monitoring.
Available to organisations interested in passive aerial detection for energy facilities, critical infrastructure, and industrial sites. We welcome exploratory conversations and technical demonstrations. All enquiries are treated in confidence.