The science · Solfeggio
963 Hz, explained
963 Hz is the highest of the nine solfeggio values, a set first put forward in the 1970s. Popularly linked with a sense of oneness, it is a description of what people say about it, not of an effect. In Sonor it is a carrier pitch: it changes the note you hear, not the band.
What the research says
The numbers were derived in the 1970s by Joseph Puleo from a pattern of verse numbers in the Bible's Book of Numbers (Science Feedback, 2022). 963 Hz is not among the six values in the earliest lists, so it is a later addition. A fact-check found no scientific or clinical evidence that any solfeggio frequency regenerates the body or removes toxins.
A PubMed search for 963 Hz combined with music, sound, tone, solfeggio, healing or acoustic returned no records.
No peer-reviewed study was located that tested a 963 Hz tone for any effect.
How Sonor uses it
963 Hz is a named carrier pitch for the isochronic tone, the highest of the nine. Choosing it changes the note you hear. The pulse rate, and so the band, stays the same. See What are carrier frequencies? for what a carrier does.
You can hear Sonor's tones on the listen page.