Third-eye chakra — A4
440.00 Hz · equal temperament
The brow or third-eye anchor is assigned A4 at 440.00 Hz, the reference pitch that defines the equal-temperament values in this map. The visual association with intuition is a modern chakra convention and must not be read as an anatomical or evidential claim about the brain or perception.
Point 6 of 7 in Singing Bowl Chakra Tones
Cross-tradition overlaps
- Third-eye chakra — A4 ↔ O — third-eye resonance (distance 0.010)
Sources
Eva Rudy Jansen, Singing Bowls: A Practical Handbook of Instruction and Use (secondary)
The handbook introduces Himalayan and Nepalese singing bowls, their resonant sounds, meditation and sound-massage uses, and practical handling; it does not establish a canonical seven-chakra frequency table.