Multi-modal life detection packages identifying breathing movements, heartbeats, and vocalizations buried under concrete and rebar.
An integrated 3-10 GHz UWB impulse radar penetrates up to 2 meters of reinforced concrete. Advanced signal processing isolates periodic sub-millimeter chest wall movements (0.2 to 0.5 Hz for respiration; 0.8 to 2.5 Hz for pulse) from background debris settling.
Sensitive seismic geophones listen for tap patterns and vocal cries, while a snake-like articulated camera head extends through 5 cm drilled voids to establish visual and two-way voice contact with trapped victims.