Check whether the two recordings are comparable
Record start/end times, known interruptions, phone placement and room context. A shorter or interrupted recording may capture fewer events simply because less audio was available. Do not fill an unrecorded interval with “quiet” or assume that recording time equals sleep time.
NHLBI describes sleep-apnea assessment through a healthcare provider and, when indicated, a sleep study. A consumer sound recording is a different kind of information. This guide organizes personal audio observations; it cannot diagnose or exclude a medical condition.
Keep self-reported morning experience separate from detected sounds. Feeling tired is worth discussing in context, but a pair of audio files cannot establish its cause. Check privacy and agreement before recording anyone else in a shared room; the linked consent guide covers that decision.
Worked comparison: different coverage, different room noise
Fictional night A records 23:00–07:00 without a known gap. Night B records 00:00–06:00 but has a known 30-minute interruption. These are recording opportunities, not measured sleep durations. The worksheet also records a fan on A and audible traffic on B.
| Field | Night A | Night B | Interpretation limit |
|---|---|---|---|
| Nominal interval | 8 hours | 6 hours | Not equivalent sleep time |
| Known missing audio | None known | 30 minutes | B has 5.5 hours known recording coverage |
| Room context | Fan | Traffic | Background sounds differ |
| Labeled clips | 12 | 9 | Raw counts do not establish a medical rate |
| Human review | 3 clips checked | 2 clips checked | Unreviewed labels remain uncertain |
Nine clips over a shorter, interrupted recording are not directly comparable to 12 over a longer one. Even dividing counts by recorded hours would produce a rate of app-labeled clips, not a validated snoring or apnea index. This example deliberately supplies no medical score.
Suppose one reviewed B clip is traffic rather than the initial label. Keep the label correction and the original uncertainty visible; do not reclassify every other clip by assumption. If you only checked 2 of 9 clips, say so rather than describing the whole night as manually verified.
Keep playback settings and conclusions modest
A different playback volume, microphone position or room sound can change how loud a clip seems. Without a calibrated measurement method, do not turn playback loudness into a decibel comparison. Check the actual clip and context instead of relying solely on a chart or label.
If frequent loud snoring, witnessed breathing pauses, gasping or daytime sleepiness concerns you, discuss the symptoms with a healthcare provider. NHLBI lists such symptoms and notes that a sleep study may be needed. A quiet recording or a low clip count does not rule out sleep apnea.
Share only the material you choose through an appropriate route, with permission where other people are identifiable. Do not post private overnight audio in a public worksheet. This comparison is useful as a concise account of what was recorded and reviewed, even when no health conclusion is possible.
Noctory labels sounds for personal reference
Noctory’s current listing describes overnight audio recording, labeled clips for snoring, sleep talking, coughing, breathing and room noise, nights/insights browsing and optional audio sharing. It warns that labels may be inaccurate and that the app is not a medical device.
We publish Noctory. It does not diagnose, treat or prevent sleep apnea or another medical condition. The short current listing does not enumerate all free recording, retention or export allowances; check the installed app and current purchase terms.
This CSV is a separate comparison record and does not import audio or calculate an apnea index. Keep recording duration, label counts, human review and morning notes in their own fields rather than combining them into an invented sleep-quality score.
If the method fits your task, explore Noctory’s listed features on an iPhone. Check current features and plans before downloading.
See Noctory for iOSDownload the free worksheet
Use the CSV in Numbers, Excel or a spreadsheet editor. Two fictional nights and a blank row. Coverage is not sleep duration; clip counts are not a snoring/apnea index or medical outcome. Replace them with your own observations. The CSV is separate from the app and no email is required.
Questions answered
Is recording duration the same as time asleep?
No. It describes the recording interval and known coverage.
Do more labeled clips mean worse sleep?
Not by themselves. Coverage, setup, background noise and label accuracy differ.
Can a quiet recording exclude sleep apnea?
No. Discuss concerning symptoms with a healthcare provider.
Continue with Noctory on iOS
Use the App Store listing to check compatibility, privacy information and current plan terms. A free download may offer paid features.
Download Noctory for iOSSources and product details
- NHLBI: Sleep apnea diagnosisUS health guidance read October 23, 2026; consumer audio is not a diagnostic sleep study.
- NHLBI: Sleep apnea symptomsSymptoms and professional follow-up guidance read October 23, 2026; no individual diagnosis.
- Noctory on the App StoreCurrent US App Store product description; checked October 23, 2026.
Editorial method: primary guidance, a current Apple listing, an original worked example and an independent critique. No search ranking, install or outcome result is claimed.