Instrument Resonances

Monochord (Sound Bed)

220.00 Hz

Note: A3

Cosmic Octave Color

Derived visible color (620 nm)

Display swatch #e9852d

EstablishedInstrument / Acoustic Reference

Evidence Level

Established

Source Count

Last Reviewed

March 23, 2026

Directly measured, standardized, or well-supported in mainstream scientific or technical literature.

This entry describes an instrument or resonance reference. Therapeutic outcomes depend on context, level, instrument build, and listener response.

Review the evidence model

The monochord was Pythagoras' tool for discovering the mathematics of music (~500 BCE). Modern therapeutic monochords (sound beds) have many strings tuned to the same note, creating a rich overtone cloud when played simultaneously.

Wavelength

1.56 m

Nearest Note

A3 (0¢)

Claim Type

Instrument / Acoustic Reference

Cosmic Octave Color

Derived visible color (620 nm) · #e9852d

Source

Pythagoras / Sound therapy

Sources

Traditional and Practitioner Sound Sources

1 atlas references

Historical, cultural, and practitioner sources used to document how frequencies are talked about in practice communities.

Traditional and practitioner sound-healing sources.

Historical Use

Pythagoras used the monochord to discover harmonic ratios. Modern sound beds used in therapy.

instrumentmonochordpythagorastherapy