Frequencies in your body

What the picture says

Four claims, all visible at a glance once the frequencies are stacked on the same axis.

1. The brain and the planet ring in the same band. The Schumann fundamental at 7.83 Hz sits exactly on the theta/alpha boundary — the band associated with hypnagogia, deep relaxation, contemplative absorption. The higher Schumann harmonics fall through alpha, beta, and the lower edge of gamma. The brain's entire low-frequency activity span (1–100 Hz) overlaps the Schumann cavity's first five modes. This is not metaphor — both are measurable, both are continuous, both fall in the same physical range.

2. The audible threshold cuts the picture in two. Below the dashed gold line (20 Hz), the body's own rhythms operate: breath, heart, brain waves, the Schumann fundamental. You don't hear them — you are them. Above the line, sound enters the audible world: the voice, the chord, the concert pitches. The same continuous logarithmic axis runs through both.

3. The φ-tuned chord lives in the voice's natural range. The trilogy's chord — E at 164.81 Hz, G♯ at 209.64 Hz (between markers), C at 266.67 Hz at one octave's transposition, G♯ at 431.36 Hz at the upper edge — sits squarely inside the band of human speech and singing fundamentals (80–300 Hz). This is not by accident. The φ-tuned C was chosen so that C × φ lands within 0.15% of the 432-Hz A — and the resulting chord ends up where the voice itself naturally lives. The architecture is tuned to the body.

4. The 432 / 440 gap is small. The two concert-pitch standards are 8 Hz apart at the A — almost invisible at this scale. The argument about 432 vs 440 is real, but it is an argument about a thirty-cent shift, not about the whole architecture. The deeper claim the trilogy makes is at the structural level: φ-tuned C, the Webb-triangle chord, Sable's chord, the Schumann resonance, the brain's bands. All of these are visible above. The choice of 432 vs 440 is downstream.

Each band, briefly

Breath (~0.2–0.3 Hz) — the slowest rhythm the body produces on its own. 12 to 18 breaths per minute at rest; slower in contemplative states. In Anima, the prolonged-exhale meditation José is taught early in the case work pulls breath toward the lower end of this band, into the territory where it begins to entrain heart rate variability.

Heartbeat (~1–1.5 Hz) — 60 to 90 BPM at rest. The HRV literature (Porges, McCraty) measures the variability rather than the rate itself; the variability spectrum overlaps the breath band and modulates with vagal tone.

Brain waves (1–100+ Hz) — five conventional bands, each associated with different states of consciousness. The Lutz/Davidson gamma-coherence measurements in long-term meditators (top of the gamma band, 40 Hz and up) are the empirical claim behind the trilogy's interest in attention as a measurable phenomenon. See the Carhart-Harris entropic-brain entry and the gamma-stimulation Bioelectromagnetism subsection.

Schumann modes (7.83 · 14.3 · 20.8 · 27.3 · 33.8 Hz) — the standing-wave frequencies of Earth's spherical waveguide cavity, formed between the surface and the ionosphere. Predicted by Otto Schumann in 1952, continuously measured ever since. See the Schumann explainer.

Voice and singing fundamentals (~80–300 Hz) — the range of human vocal fold vibration. Bass voices sit at the low end, sopranos at the high. The φ-tuned C at 266.67 Hz is in the middle of the soprano fundamental range and is exactly where Jeff Buckley sang on the Hallelujah recordings.

The φ-chord (164.81 · 209.64 · 266.67 · 339.20 · 431.36 Hz) — the Webb-triangle chord and Sable's chord, each built on the φ-tuned C. The bracket on the right side of the diagram shows the chord's full vertical span; the four gold markers are its individual notes. See the φ-tuned C explainer for how the frequencies are derived.

The receiver-model claim, made visible. Body rhythms below the audible threshold; planet's electromagnetic ringing in the same band; voice and chord in the band above. The body is tuned to receive a range that begins at the heartbeat and crosses into the band the planet is broadcasting. Read Schumann and φ-tuned C next.