Guide · evidence

Binaural beats: what they are and what the research shows

Manifestation audio products lean heavily on "sound frequencies" and "brainwave entrainment." Here is what those terms mean and how strong the actual evidence is.

Illustration of two tone sources forming one perceived pulse

Updated 28 August 2026 · Reviewed against peer-reviewed sources.

What a binaural beat is

If one ear hears a steady tone at 200 Hz and the other hears 210 Hz, the brain perceives a third, pulsing "beat" at the difference, 10 Hz. That perceived pulse is the binaural beat. It only works with headphones, because each ear needs its own tone. The related idea, brainwave entrainment, is the hypothesis that exposing the brain to a rhythmic stimulus at a target frequency nudges brain activity toward that rhythm, for example, a 6 Hz beat to encourage "theta" activity linked with relaxation.

What the research actually shows

The most cited synthesis is a 2019 meta-analysis by García-Argibay, Santed and Reales in Psychological Research, pooling 22 studies. It reported a medium overall effect (Hedges' g ≈ 0.45) across outcomes, with beneficial effects on anxiety, memory and attention, and a larger effect on anxiety in the theta/delta range. Later systematic reviews on binaural beats for anxiety and for procedural pain have generally found positive but heterogeneous results.

Reasonable takeaways

Binaural beats are low-risk and there is moderate, mixed evidence that they can modestly reduce anxiety and support attention for some people. Listening before a task may work better than during it, and masking with white noise does not appear necessary.

Where the evidence stops

Studies vary a lot in quality, frequencies and outcomes; some find no effect. Direct EEG evidence that beats reliably "entrain" brainwaves is weaker than the popular claims suggest. And there is no evidence at all that binaural beats influence income, "manifest" events, or act on the pineal gland. Benefits, where they occur, look like relaxation and focus, not magic.

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How this applies to The Last Wish

The Last Wish describes using "sound frequencies" and theta/delta entrainment. Even taking that at face value, the honest ceiling on what that can do is "a calmer, more focused seven minutes", which is genuinely useful for a daily intention practice, and is also available from countless free tracks. The product's added claims about consciousness and abundance are not supported by binaural-beat research. See the review.

Trying them safely

Use stereo headphones at a comfortable volume.
Do not listen while driving or operating machinery, the intent is a relaxed state.
People with epilepsy or who are prone to seizures should check with a clinician before using rhythmic audio-visual stimulation.
Judge it by how you feel and function, not by a frequency label.

Curious about the product itself?

Our review covers what The Last Wish's audio can and can't reasonably do.

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Reference resources

Entry points to the research and background behind this page: database searches and pages from PubMed, PubMed Central, Google Scholar, government health bodies and universities. These are starting points for the literature, not evidence that any single study proves The Last Wish works. Always read the primary source and check its methods and limitations.