You have forty sleep recordings. Which ones can you trust?
People wear a small headband that records their brain activity while they sleep at home. Sometimes the headband slips, loses contact with the skin, or stops recording for part of the night.
One 2026 study checked 100 nights recorded this way. 74 were fine, 16 were partly bad and 10 failed completely. That’s about one in four nights you can’t fully trust.
Without a check, you only find out after you’ve analyzed the data, or you never do. Source: medRxiv preprint, not yet peer reviewed
Drop in the file.
Somnium scans every channel in five-second windows and marks what looks wrong.
Every mark comes with its reason.
Click a mark to see the measurement, the rule that tripped, and what usually causes it. You can check the reasoning instead of trusting a score.
Write your own rules.
Type a rule in plain words, or drag across a stretch you know is bad and let Somnium propose the threshold, or just set the numbers yourself. Whichever you pick, the rule shows what it would flag before you add it.
Save your rules and reuse them.
Your rules save as a file. Run the same standard on the next recording, or hand the file to the next student.