In short: sleep talking is very common, and usually harmless. To find out whether you do it, ask whoever shares your room, or record a few nights with a recorder that switches on only when it hears something, kept beside the bed and charging, then listen back in the morning. Talk to a doctor if you also snore loudly, gasp or stop breathing, or act out your dreams.
How common is sleep talking?
Very. About two in three adults report having talked in their sleep at some point. It can happen in any stage of sleep, from light sleep to REM, the stage where most dreaming happens. It tends to come and go, and is more likely with:
- stress,
- fever,
- too little sleep,
- alcohol.
Most episodes are short: a few words or a mumbled phrase. When researchers recorded hundreds of sleep-talking episodes, they found most were brief, yet followed the grammar of ordinary speech, and that “no” and negative or abrupt remarks came up far more often than in daytime conversation.
Why you probably don’t know you do it
You don’t remember sleep talking for the same reason you don’t remember most of the night: the brain isn’t storing memories the way it does when you’re awake. So the usual way people find out is a partner or a roommate mentioning it in the morning. If you sleep alone, the only way is to record.
How to record yourself sleep talking
- Use a recorder that’s triggered by sound. A whole night of continuous audio is eight hours you’ll never listen to. A sound-activated recorder keeps only the moments when something happens.
- Put the phone beside the bed, with the microphone uncovered, close enough to pick up a mumble at normal bedside distance.
- Keep it charging overnight, so it doesn’t run out, and so the phone has no reason to stop the recording.
- Record several nights. Sleep talking comes and goes; one quiet night doesn’t mean much.
- Note what was different on the nights you talked: a late drink, a stressful day, a short night. Patterns show up after a week or two.
- Tell your partner, if you share the room. A recording may pick up their voice too.
Is sleep talking a sign of a problem?
On its own, usually not. It is worth talking to a doctor if it comes with:
- loud, frequent snoring,
- gasping, or pauses in your breathing during sleep,
- acting out dreams: shouting, punching or kicking in your sleep,
- loud, frequent sleep talking that is new, or getting worse.
A recording is useful to bring along: hearing what actually happens at night tells a doctor much more than a description.
How Sleep Talk Recorder & Snore does it
Sleep Talk Recorder & Snore is an iPhone and iPad app built for exactly this.
- It records only when it hears something. Tap Start tonight and go to sleep. Each loud enough moment, usually speech and sometimes a snore or a cough, is saved as a short clip, so the morning review is minutes, not hours. Sensitivity has three levels, from “only loud, clear speech” for a shared bed to “even quiet mumbles”.
- It writes down what you said. When you end the night, the speech clips are transcribed on your device with Apple’s speech recognition, in your device language. Clear speech becomes text; mumbles may not, and the audio is there to play back.
- It labels the sounds you never hear: snoring, coughing, breathing and gasps, detected with Apple’s on-device sound classifier.
- It shows when it happened. If Apple Health has sleep-stage data, from an Apple Watch or another tracker, every sound is placed on your sleep stages, so you can see whether you talk in REM, in deep sleep, or while waking.
- It shows patterns over time: which stage you talk and snore in and, once you have five nights with a routine note such as alcohol and five without, how those nights compare.
Recording, transcripts and your last seven nights are free, with no time limit; Premium adds unlimited history and 12-week patterns. There’s no account and no cloud: your audio and transcripts stay on your device, and nothing is uploaded.
Sleep Talk is not a medical device and doesn’t diagnose sleep disorders.
Common questions
How can I tell if I talk in my sleep?
Ask someone who shares your room, or record a few nights with a sound-activated recorder beside the bed and listen back in the morning. Sleep talking comes and goes, so record more than one night.
Is it normal to talk in your sleep?
Yes. About two in three adults report having talked in their sleep at some point. It is usually harmless, and more likely with stress, fever, short sleep or alcohol.
What does it mean if you talk in your sleep a lot?
Usually nothing serious. It is worth seeing a doctor if it is loud, frequent and new, or if it comes with loud snoring, gasping or pauses in breathing, or acting out your dreams.
Do people say real words when they sleep talk?
Often, yes. Most episodes are short, a few words, but they usually follow the grammar of normal speech. Mumbles and partial words are common too.
Can my phone record me sleep talking all night?
Yes. Keep it beside the bed, charging, with the microphone uncovered. A sound-activated recording app such as Sleep Talk Recorder & Snore saves only the moments when you speak, and transcribes them in the morning.