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 and one study only. 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.