Inspiration
Drone warfare is becoming increasingly prevalent, especially in urban areas.
What it does
Our system detects drones using audio analysis in real time, with a network of microphone throughout a city.
How we built it
We used a 4-node interferometry microphone system to determine the probabilistic position of a point source which would update real time with little latency. Many revisions improved the prototype from being a 2D heatmap to being a fully real-time and accurate 3D depiction of the area.
Challenges we ran into
Improving the accuracy was difficult
Accomplishments that we're proud of
We could detect relatively faint signals even with a lot of noise in the area, and the entire system relied solely on DSP without any ML/AI in the program.
What we learned
DSP is challenging... but highly effective at determining point sources of signals
What's next for 21st Sentry
We'll see! Maybe more testing & accuracy improvement.
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