Binaural beats can help you focus by giving your attention a steady rhythm to settle toward instead of chasing itself. The frequency that fits focused work is gamma, around 40 Hz. The effect is real for some people and modest, and the honest version is that the research is mixed.
This is the practical page: which frequency, how to run a session, and what to expect. For the mechanism and the full evidence, see what 40 Hz is and the honest science page.
Why a beat might help attention
A binaural beat is created when each ear hears a slightly different tone and your brain perceives the difference as a slow pulse. The theory is neural entrainment: the brain may drift toward the rhythm it is given. For focus, the target is gamma activity, which is tied to sustained attention and working memory (Jensen, Kaiser & Lachaux, 2007). The beat does not force your brain into a state. It offers one steady thing to lean on while you work.
Which frequency for focus
Match the band to the job. For focus, you want the fast end.
| You want | Band | Beat frequency |
|---|---|---|
| Focus, alertness | Gamma | around 40 Hz |
| Calm, light focus | Alpha | 8 to 13 Hz |
| Winding down | Theta | 4 to 8 Hz |
| Sleep | Delta | under 4 Hz |
A gamma beat around 40 Hz is the sensible default for work. Slower beats are aimed at relaxation and rest, so reaching for a theta track when you need to concentrate works against you.
What the studies show
Be even-handed here. A 2019 meta-analysis pooled many studies and found a modest overall benefit for cognition, with longer pre-task exposure helping more. A 2023 systematic review found the evidence for actual brainwave entrainment inconsistent, with more studies failing to show it than showing it. So: a small average effect, an uncertain mechanism, and results that vary from person to person. Worth trying, not worth overselling.
How to get the most from a session
Use stereo headphones, since the beat will not form without them. Start the beat a few minutes before the work, not after you are already stuck, because the meta-analysis found earlier exposure worked better. Keep the volume low enough to think over. Give it ten to twenty minutes before you decide, and judge it by whether you stayed on task, not by whether you felt a jolt.
How Quell does it
Quell starts a 40 Hz binaural beat with one tap and runs a count-up timer, so there is no track to pick and no countdown to beat. The beat is free and on by default; a coach voice and focus music are optional layers on top. If starting is the hard part for you, the ADHD focus mode adds a brown-noise bed under the beat, and the deep work guide covers the wider question of what to play while you work.
Quell is a focus tool, not a medical device. It is not intended to diagnose, treat, cure, or prevent any condition.