Instrument Resonances
Tuning Fork — C256 (Scientific Pitch)
256.00 Hz
Note: C4 (scientific pitch)
Cosmic Octave Color
Derived visible color (533 nm)
Display swatch #73c236
EstablishedInstrument / Acoustic Reference
Evidence Level
Established
Source Count
1
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 modelC256 tuning fork is used in medical diagnostics (Weber and Rinne tests). Also called "scientific pitch" or "philosopher's C." C256 = 2^8 Hz, making octave relationships mathematically clean.
Wavelength
1.34 m
Nearest Note
C4 (-38¢)
Claim Type
Instrument / Acoustic Reference
Cosmic Octave Color
Derived visible color (533 nm) · #73c236
Source
Scientific tuning / medical diagnostics
Sources
Body Rhythm and Clinical Sciences
1 atlas references
Used for heart, breath, circadian, and other biological rhythm references.
Cardiology, physiology, chronobiology, and cell biology references.
Historical Use
Medical diagnostics (hearing tests, neurological exams), Pythagorean tuning reference
instrumenttuning-forkmedicalscientific