Neptune tuning fork — 211.44 Hz

211.44 Hz is the tone of the planet Neptune: 164.8 years for one orbit. In tradition it stands for dreams, intuition, compassion and the dissolving of boundaries.

Neptune, imaged by Voyager 2 · NASA/JPL, public domain

Frequency (middle octave)	211.44 Hz
Note	G# · +31 cents from standard tuning A = 440 Hz
Tuning in which this is an exact note	A = 448.02 Hz
Cycle	orbit around the Sun164.8 years
Doublings from the cycle's frequency	40
Color (the same frequency as light)	orange · 645 nm
Paint on the Acutonics tuning fork	turquoiseshade measured from photos in the school's catalog — this is NOT the computed colorcolor name “Sea Green” — school page · Acutonics Canada
What can be checked	Reproducible

Neptune sits just one hertz away from the New Moon tone (210.42 Hz). Together they give an almost imperceptible pulsation, one “breath” roughly every second; ultra-slow pairs like this are used when what is wanted is not an effect but a background.

With Venus, Neptune gives 9.79 Hz, in the alpha range, and the method describes this pair as “self-worth plus dissolving fear”. The wording belongs to tradition, but the arithmetic underneath it is real.

How this number is obtained

The axis is logarithmic: each doubling raises the sound by exactly one octave. The pitch goes up, the note stays the same.

Given: the period of the planet Neptune

164.8 years = 5 200 212 096 seconds

1The frequency of the cycle itself: how many times it repeats per second

1 ÷ 5 200 212 096 = 0.000 000 000 192 30the same in short form: 1.92 × 10⁻¹⁰ Hz

A tiny number that cannot be heard: human hearing starts at about 20 Hz. But it is a real frequency, and we can keep working with it.

2Raising it into the audible range: each doubling is one octave up

0.000 000 000 192 30 × 2 = 0.000 000 000 384 601st doubling

0.000 000 000 384 60 × 2 = 0.000 000 000 769 202nd doubling

0.000 000 000 769 20 × 2 = 0.000 000 001 538 43rd doubling

⋮36 more doublings just like these

105.72 × 2 = 211.4440th doubling: now it is in the middle fork band

Or, in a single line:

0.000 000 000 192 30 × 2⁴⁰ = 211.44 Hz

where 2⁴⁰ = 1 099 511 627 776, the number of times the frequency has grown

The value Cousto published is 211.44 Hz. It matches.

3Which note it is

12 × log₂(211.44 ÷ 440) = −12.69semitones from A

nearest whole number: −13 = G#and that is the note

remainder: 0.31 of a semitone = 31 centshow far the tone is from the note

One hundred cents make one semitone. Planetary frequencies almost never land exactly on a note: orbits know nothing about musical tuning.

4In which tuning it would be an exact note

211.44 ÷ 2^(−13 ÷ 12) = 448.02 Hz

An ordinary piano is tuned to A = 440 Hz. Here the tone gets a tuning of its own, and for the Om tone it is exactly the much-discussed 432 Hz.

5Color: the same frequency raised all the way to light

211.44 × 2⁴¹ = 464 952 504 742 849 Hzthat is 4.65 × 10¹⁴ Hz, already visible light

299 792 458 ÷ 464 952 504 742 849 = 645 nmwavelength → orange

Divide the speed of light by the frequency and you get the wavelength. This is a model, not the measured color of a planet, but the arithmetic is exactly the same as for sound.

Octave ladder

Octave	Frequency	How it is used
2^37	26.43 Hz	below or at the edge of hearing
2^38	52.86 Hz	below or at the edge of hearing
2^39	105.72 Hz	low: stronger vibration on the body
2^40	211.44 Hz	the main tuning fork
2^41	422.87 Hz	high: work in the field above the body
2^42	845.74 Hz	high: work in the field above the body

What tradition ascribes

Tradition

Intuition, gentleness, dissolving boundaries.

This is a system of correspondences, not the result of a measurement: controlled studies of planetary frequencies do not exist. We present the tradition because it exists and the practice is built on it — but we call it tradition.

Intervals with this tone

Interval	Pair	Ratio	Difference
Om / Neptune 5	Om + Neptune	1.554	75.34 Hz

All frequencies in one chart · how the calculation works · what has been proven