THE LAB / Research.
The Claims Ledger: what the science does and doesn’t support
Every claim we make about the Mask, the evidence behind it, and where that evidence comes from.
| Claim | Evidence | Study or source |
|---|---|---|
| Your brain produces rhythmic electrical activity, and those rhythms change with your state. | Long established, and directly measurable with EEG. | Established neuroscience. Human EEG has been recorded since 1924. |
| Rhythmic light and sound delivered at a steady frequency can guide brain activity toward similar frequency ranges. This is called neural entrainment. | Repeatedly demonstrated in published research and measurable on EEG. | Notbohm and Herrmann, Journal of Neuroscience, 2016. · Rahmani, Romero Lauro and Pisoni, Brain Sciences 15(10):1070, 2025. |
| Light and sound delivered together are engineered to produce a larger response than either alone. | Supported in the published literature on multimodal stimulation. Directionally consistent with our own in-lab work, which was not designed to test it and does not confirm it. | Rahmani, Romero Lauro and Pisoni, 2025. · Domayn in-lab study, Beijing, 2026. |
| Audio-visual stimulation is studied in research and clinical settings, including randomized, sham-controlled trials. | Cited only to show the field is examined at a clinical standard. Those trials use 40 Hz stimulation in a clinical population over months. Our protocols do not deliver 40 Hz stimulation, and this research says nothing about what the Mask does. | Cognito Therapeutics OVERTURE, Frontiers in Neurology, 2024. · HOPE study, NCT05637801. |
The Mask
These claims come from one study. Domayn in-lab study, Beijing, February 2026. Single daytime session in a room not set up for sleeping. Self-report n=93. Physiological measures n=71. No placebo condition, no control group.
| Claim | Evidence | Study or source |
|---|---|---|
| Self-reported anxiety fell after a single session, and stayed lower to the end of the session. | Effect size dz −0.51. Self-report on a visual analogue scale, n=93. | Domayn in-lab study, Beijing, February 2026. |
| Self-reported relaxation rose across the session. | General relaxation dz 0.58. Muscle relaxation dz 0.53. Self-report, n=93. | Domayn in-lab study, Beijing, February 2026. |
| Heart-rate variability rose during the session, and heart rate fell. | RMSSD dz 0.64 to 0.66 against both a resting and an engaged baseline. Heart rate dz −0.54 to −0.77. n=71. | Domayn in-lab study, Beijing, February 2026. |
| A summary score from EEG showed reduced vigilance during the session. | Effect size dz −0.67, measured against an eyes-closed resting baseline so that eye closure alone does not explain it. n=71. | Domayn in-lab study, Beijing, February 2026. |
| Theta activity, associated with drowsiness and sleep onset, rose during the session. | Theta up 23.7% against the eyes-closed resting baseline. n=71. | Domayn in-lab study, Beijing, February 2026. |
| The change is reversible. Measures returned toward baseline after the session ended. | Observed across EEG, heart rate and self-report. n=93 self-report, n=71 physiological. | Domayn in-lab study, Beijing, February 2026. |