Do you know how Ukrainian cities have been efficiently protecting themselves from drones for the past 4 years?
It’s not traditional radar. It’s not expensive RF detectors.
When faced with unprecedented volumes of low-flying cheap attack drones and versatile commercial quadcopters, conventional air defense systems were either blind due to urban clutter or economically unsustainable to use.
The solution they turned to was sound.
For years now, Ukraine has deployed massive, distributed networks of acoustic sensors. Initiatives known publicly as the “Zvook” project and part of the broader “Sky Fortress” umbrella have utilized thousands of microphones scattered across rooftops, cell towers, and fields.
These acoustic networks listen to the sky 24/7.
They don’t care if a drone is radio-silent, autonomous, or GPS-denied.
If it has propellers, it makes noise.
And if it makes noise, they catch it, triangulate it, and send alert vectors to mobile defense teams.
This is not theoretical technology. This is combat-proven reality, operating at massive scale today.
At Askalon Industries, we recognized that this paradigm shift is not temporary; it is the future of lower airspace security.
We are taking this battle-tested concept – distributed acoustic sensing – and elevating it with industrial-grade hardware and proprietary edge AI.
We are building the robust, scalable acoustic layer necessary to protect critical infrastructure, airports, and prisons across the world from the threats that radar misses.
The lesson from the skies over Ukraine is clear: effective drone detection doesn’t have to cost millions per unit, but it does have to listen.
