Detect drones where others go blind.

DroSonic listens for the sound of a drone's propellers, then detects, classifies and locates it on low-cost edge hardware. No emissions, no radio link required, no cloud.

Start a conversation How it works
  • NVIDIA Inception Program
  • Colorado SBDC TechVenture Accelerator
  • BEN Colorado, Inclusive Impact Catalyst (IIC)
  • Colorado APEX Accelerator
  • Encountering Innovation
  • DIU Kansas On-Ramp Hub
  • Civil-Military Innovation Institute (CMI2)
  • U.S. Army
  • U.S. Army DEVCOM Army Research Laboratory
  • U.S. Central Command (USCENTCOM)
  • JFIX

Every drone has spinning propellers, and propellers make sound. That signature can’t be switched off, jammed or spoofed. DroSonic listens for it, so drones with no radio link and no radar signature still have nowhere to hide.

8Months from first work to live-drone testing
0Radio emissions
11Programs and partners

The drones that matter now give radar and RF nothing to find.

Fiber-optic control

Control and video run down a physical cable. The radio spectrum stays silent: there is no link to detect, decode or jam.

Autonomous flight

Pre-programmed drones fly with no control link at all, so RF detectors and jammers have nothing to intercept.

Small and low

Group 1 drones have radar cross-sections too small for most fielded radar to resolve at operationally useful ranges, especially at low altitude.

Listen. Classify. Locate. Cue.

A network of low-cost acoustic nodes. Each one does its own detection and classification, and the network fuses their timing to find the drone.

Listen

Microphone nodes pick up the blade-pass tone and its harmonics: the acoustic comb every spinning propeller produces.

Classify

Compressed neural networks running on each node classify the signature locally, in real time, with no cloud dependency.

Locate

Nodes fuse GCC-PHAT time-difference-of-arrival measurements across the network to estimate where the drone is.

Cue

Tracks are handed to operators and to the effectors of a layered counter-UAS defense.

Emissions
None. Fully passive
Spectrum license
Not required
Processing
On-node edge AI
Lost connectivity
Degrades gracefully

Built for sites where the spectrum is contested.

  1. Military defense

    Forward operating bases and perimeter security in contested RF environments, where a passive sensor adds coverage without adding an emitter.

  2. Critical infrastructure

    Power plants, airports, water treatment and fuel depots vulnerable to drone intrusion. No spectrum license and no emissions near sensitive equipment.

  3. Border & perimeter

    Distributed linear arrays for extended perimeter protection and remote deployments.

Field tests, milestones and events.

DroSonic Joins the SOF RACER Consortium

DroSonic to Field-Test Prototype at JIFX 27-1

Helmet Acoustic Array for Passive Drone Detection

DroSonic at AUSA 2026 in Washington, D.C.

Acoustic Detection for Hard-Kill C-UAS Systems

DroSonic Field-Tested Against Live Drones at DIRT Days 26.04

VolAnti: Open-Source Acoustic Drone Detection

DroSonic Files US Provisional Patent for Its Core Detection Technology
All company news

Open-source research, published weekly.

OSINT

When Jamming Stops Working

Jammers were the first answer to small drones. Fibre-optic cable, mobile-network control and onboard autonomy are taking that answer away.
OSINT

Watching the Bases

Drones now fly over U.S. bases once or twice a day and probe NATO nuclear sites. Detection has improved; stopping them still lags.
OSINT

Thirty-Four Thousand Flights

CBP logged nearly 35,000 drone flights near the Mexico border in a year. Seeing them, not stopping them, is the hard part.
OSINT

Allowed to Listen, Not to Shoot

The SAFER SKIES Act gives U.S. police counter-drone powers. Stopping drones stays with certified agencies; how you detect one still matters.
OSINT

Closed on a Sighting

Airports keep closing on drone reports they can neither confirm nor rule out. From Gatwick to Leipzig, the gap is detection.
OSINT

What a Microphone Can Hear

Acoustic sensors detect drones by the sound they can't switch off. How they work, how far they hear, and where they beat radar and RF.
OSINT

The Price of a Kill

A $35,000 drone can cost a defender a $4 million missile. Cheap killers exist, but they only work if something cheap tells them where to shoot.
OSINT

Is It a Bird?

Set a radar's bar low and birds flood the screen; set it high and drones slip through. Layered sensing is the way out.
All reports on DroSonic OSINT

Straight answers.

What is DroSonic?

DroSonic is a passive acoustic drone detection system built by Koraiio LLC in Denver, Colorado. It uses microphones and edge AI to detect, classify, and locate drones by the sound of their propellers, without emitting any radio or radar signal.

How does acoustic drone detection work?

Every drone's spinning propellers produce an acoustic signature that cannot be switched off. DroSonic sensor nodes listen for that sound, classify it with compressed neural networks running locally on each node, and fuse GCC-PHAT time-difference-of-arrival measurements across a distributed network of nodes to locate the drone.

Can DroSonic detect fiber-optic and autonomous drones?

Yes. Because DroSonic listens for propeller sound rather than a radio link, it is designed to detect drones that emit no RF at all, including fiber-optic guided drones and fully autonomous pre-programmed drones that RF detectors and jammers cannot see.

Does DroSonic need a network, cloud, or spectrum license?

No. Detection is passive, so there are no emissions and no spectrum license is required. Classification runs on edge hardware inside each node with no cloud dependency, and the node network degrades gracefully if nodes lose connectivity.

Has DroSonic been tested in the field?

Yes. In September 2026 a DroSonic prototype was tested against live drones at DIRT Days 26.04, a field exercise supported by the Civil-Military Innovation Institute (CMI2) with U.S. Central Command and U.S. Army DEVCOM. DroSonic is now working toward field demonstrations with operational partners. Read about the field test.

Where can DroSonic be used?

DroSonic targets military bases and forward operating base perimeters, critical infrastructure such as power plants, airports, water treatment, and fuel depots, and border and perimeter security, especially in electronically contested or GPS-denied environments.

Can government agencies buy from DroSonic?

Yes. Koraiio LLC, the company behind DroSonic, is registered for U.S. federal contracting: SAM.gov active, CAGE code 20L04, UEI JHAPZ8QKD8K9, primary NAICS 541715. See registration details.

Evaluate acoustic counter-UAS.

For program offices, integrators and test ranges evaluating counter-UAS.

Email sudo@drosonic.com