Sona-2 for voice check-in platforms
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The nineteen-day blind window

One patient, four weeks. The same visit cadence. Two different pictures.

A resident's voice, read every day, crosses into a range where a clinician would act by day 9 to 11. What the resident says when asked stays "I'm fine" the entire time. The next scheduled check-in isn't until day 28. Nothing about the visit changes between those two lines. Only the sampling rate does.

INTERVENTION RANGE DAY 9 TO 11 MOVES WELL OUTSIDE BASELINE AMPLIFIER SUGGESTS A CLOSER LOOK DAY 28 · NEXT CHECK "I'm doing just fine" DAY 0 DAY 9 TO 11 DAY 14 DAY 28 STANDARD CHECK-INS 2 CHECKS IN 28 DAYS AMPLIFIER, EVERY CALL 29 ASSESSMENTS, NO NEW STEP IN THE CALL 19 DAYS OF DECLINE NOBODY IS LOOKING AT
What the voice shows, below the intervention range What the voice shows, inside it What the person says when asked Standard check-in Daily reading

Illustrative, built to the shape of the evidence on the following pages, not a single patient's real trace. "Standard check-ins" stands in for whatever periodic assessment cadence a program already runs, not any specific named product. The decline-speed figures behind the day 9 to 11 crossing come from acute decompensation literature, not from this specific curve.