HELLBAT - Acoustic Drone Detection

HELLBAT — Acoustic Drone Detection at the Edge Modern counter-UAS depends on RF and radar — both fail against the threats that matter most. Acoustic is the missing modality. Two MEMS mics + ESP32-S3 sensor node feed a Jetson running bio-inspired modulation features and a probabilistic classifier; GCC-PHAT on stereo audio gives bearing. <200ms latency, no GPS, no RF emissions. Sensor node ~$20. Path to <$50/node at scale via custom SoC. A cheap node is a node you can lose, and a mesh of them triangulates not just drones, but small-arms fire and mortar teams.