Headphones on: a 3.5 Hz binaural tone for sleep
“Headphones on. 30 seconds.” A soft, slow binaural tone under warm brown noise, over still images of a lake at night that drift in very slowly.
Watch on YouTube · SleepBetter channel · Brown Noise
Made with AI. Parts of this video are AI-generated (see “How this was made” below).
Headphones needed. The binaural part works only with headphones: a binaural beat only exists when each ear gets its own tone. On a speaker you will just hear a soft hum. Keep the volume low, and don’t listen while driving.
What it is
A short listen to the same binaural bed that plays under our guided meditations: a 200 Hz tone in the left ear and a 203.5 Hz tone in the right, mixed under warm brown noise. With headphones, the two tones combine into a slow, gentle pulsing at about 3.5 times a second. The pictures are AI still images of a quiet lake at night with a slow zoom.
Why headphones
A binaural beat only exists when each ear gets its own tone. On a speaker the two tones mix in the air before they reach you, so you will just hear a soft hum and the noise. Any stereo headphones or earbuds work. Keep the volume low and comfortable; it should sit in the background, not fill your head. Our binaural beats guide explains what the research does and doesn’t show: 3.5 Hz sits in the range scientists call delta, but studies are mixed, and we offer it as a slow, low sound to relax to, not as a way to change your brain state.
Longer listen
If you like the sound, our guided sleep meditation for overthinking ends with about an hour of the same tone and noise after the voice stops. For a speaker instead of headphones, deep sleep brown noise gives you the warm noise layer on its own for eight hours.
Sound design note
Both tones and the noise are generated by SleepBetter. We use a low carrier around 200 Hz because higher tones can feel piercing in earbuds, and the brown noise softens the edges so the pulse is felt more than heard. Don’t listen while driving or doing anything that needs your full attention.
How this was made
The night-lake pictures are AI-generated still images, animated with a slow zoom. The binaural tones and brown noise are generated by SleepBetter. No voice.
Questions
Does it work on a phone speaker?
Not as a binaural beat. Each ear needs its own tone, so use stereo headphones or earbuds. On a speaker you will hear a soft hum and brown noise.
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Sleep videos and guided relaxation are for general wellness, not medical advice. If poor sleep is affecting your days, talk to a doctor or a sleep specialist.