energies · XIX / XX · Sphäre D · Tiefe & Integration · All 20

Five tools. Sound that works.

200 hertz in the left ear, 210 in the right — the difference sits in the alpha range. Five sound tools, generated right in the browser: no files, no tracking. And what only tradition claims gets called exactly that here.

Resonance Studio · 5 tools

Alpha · 10 Hz

Binaural Beat

200 Hz left, 210 Hz right. Difference = 10 Hz, alpha range. Put on headphones. Meta-analysis (Garcia-Argibay 2019, 22 studies): small but consistent effect on attention.

3-10 Min · 📐

220 Hz + Harmonics

Singing bowl

Tibetan singing-bowl frequency with natural overtones. Goldsby 2017 (RCT, n=62): significant for stress & mood (d=0.6-0.8). Replicated 2023.

2-5 Min · 📐🌀

528 Hz

Solfeggio · 528 Hz

The most popular Solfeggio frequency. Claims about DNA repair are not peer-reviewed. What works: any calming music calms HRV — that is established.

5 Min · 🌀

C3 + G3

Om · Drone

Deep drone from two sine tones (C3 + G3 · perfect fifth). Slows breathing. Telles et al. 2019 (RCT): regular om-practice reduces HRV LF/HF ratio.

10+ Min · 📐🌀

1/f Spectrum

Pink Noise

1/f noise — natural acoustic carpet, helps with falling asleep and concentration. Suzuki 2017 (RCT, n=13): deeper sleep phases, improved memory consolidation.

unlimited · 📐

If you listen with headphones: keep the volume comfortable. If you have tinnitus or hearing sensitivity: test briefly and decide. These tools are not a substitute for therapy.

armarium instrumentorum · beyond the browser

Seven tools. A single mechanism.

What you hear above with the Web Audio API, humans have practised for millennia with physical sound. Each of these tools uncouples the body from the beta-waking mode and leads it into measurable HRV coherence.

1. Tuning fork

furca tonalis · 1711, John Shore

Pure sine tone, felt in the body. Frequency therapy uses it at acupuncture points — small but replicated.

Beaulieu 2010 2. ### Chladni plate

tabula vibrans · 1787

Sand on a vibrating plate forms geometric patterns per frequency. Makes visible that vibration is form.

Chladni · Hans Jenny 3. ### Headphones

cochlea isolata · stereo

Binaural hearing only works in stereo isolation. Over-ear > in-ear for binaural effects.

Lavallee 2011 4. ### HRV sensor

variatio cordis · objectiva

Heart rate variability — the objective measure of autonomic balance. Sound practice raises HRV coherence.

McCraty 2015 5. ### Pendulum

sympathia oscillans · 1665

Two pendulums of equal frequency synchronise via wall coupling — Huygens’ original finding.

Huygens 1665 6. ### Oscillator

fons sinūs · analog

Electronic oscillation source — generates pure sine/square waves. The Web Audio original. Here digital, there analog.

Helmholtz · 1862 7. ### Brain-Cross

sectio cerebri · auditoria

Sagittal section through the cortex. Where sound first arrives: Brodmann 41/42, primary auditory cortex.

Brodmann 1909

1. 1 · Not peer-reviewed: DNA repair at 528 Hz. Established: that calming music calms. The more boring claim wins more often than we would like.