# Signal Chase

- **Event:** [Meta Global AI Developer Hackathon](https://cerebralvalley.ai/e/meta-ai-developer-hackathon)
- **When:** Oct 26, 12:00 PM – Nov 4, 9:00 PM (EST)
- **Where:** Online
- **Team:** [Yeon Jun Kim](https://cerebralvalley.ai/u/Calavera)
- **GitHub:** https://github.com/calavera16/SignalChase
- **Demo video:** https://youtu.be/FOfwBFH0nXI
- **Gallery:** https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery
- **Page:** https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/2223

A signal can look cleaner while becoming less useful for the measurement an experiment needs. Filtering can shift detected pulse timings, reshape a waveform, or introduce unmatched detections. Those changes can be easy to miss in a smooth-looking plot.

I built SignalTrace from my own experience working with biosignals. It helps researchers answer a practical question: “What did this preprocessing choice change, and does that matter for my experiment?”

A researcher opens a recording, specifies their measurement goal and optionally sets acceptable limits. Meta directs a bounded investigation through local analysis tools. SignalTrace presents the findings as an animated explanation connected to measured comparisons, a detailed report and reproducible evidence.

The demo shows why this matters: average timing changes can remain small even while individual detected peaks lose their matches to the original recording. Researchers can inspect the consequential differences instead of relying on one summary number.

The current implementation focuses on PPG, the optical pulse signal used by many wearables. During the hackathon, I connected established signal-processing methods into a complete workflow for Meta-directed investigation, measurement-based feedback and visual explanation. SignalTrace gives researchers an inspectable basis for choosing their next experiment, including when the evidence remains inconclusive.

## More from Meta Global AI Developer Hackathon

- [Stephen Pasco](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/2220)
- [Bucketa](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/2221)
- [VoiceNav AI](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/2222)
- [Team Ruthwik](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/2224)
- [VISHAL YADAV](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/2225)
- [Retrodict](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/2226)

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