H04 — How it works
End-to-end
| Step | Where | What |
|---|---|---|
| 1 | tunes-ios | Pick journey · record PCM + motion locally |
| 2 | tunes-ios | Infer station boundaries · user corrects (timeline) |
| 3 | tunes-ios | Preview exact upload · consent |
| 4 | tunes-ios → tunes-web | Upload derived features (+ metadata), not raw by default |
| 5 | tunes-web | Inspect · validate · quality flags · aggregate · edit |
| 6 | tunes-web → tunes | Versioned open release + methodology pages |
Evidence and release layers (keep separate)
| Layer | Contents |
|---|---|
| Device-local (outside public release layers) | Raw PCM on device by default |
| L0 observations | Consented derived features, flags, provenance and separate perception answers |
| L1 reprocessing | New derived results from a named pipeline version |
| L2 aggregates | Section summaries, uncertainty, tier mix and sample size |
| L3 interpretations | Map styles, rankings and passenger-facing copy; perception remains labelled and separate from objective acoustics |
Comparison unit
Station-to-station section with duration T (same discipline as professional interior surveys).
Detail
system overview · data flow / privacy · public data model · recorder · schema