The Science of Solfeggio Frequencies

Why frequency matters

Sound is pressure. Every tone you hear is a wave moving air molecules into your ear, your skin, and — through bone conduction — your skull. Different frequencies set different tissues into sympathetic motion.

The six classical tones

The Solfeggio frequencies (396, 417, 528, 639, 741, 852 Hz) trace back to a medieval hymn to John the Baptist. Modern interest revived them in the 1970s, and contemporary listeners report distinct subjective effects at each tone.

What the research shows

• 432 Hz vs 440 Hz: A 2019 study in Acta Bio Medica found lower heart rate and reduced anxiety in subjects listening to music tuned to 432 Hz.

• 528 Hz: Research from Japan (2018) showed measurable reductions in salivary cortisol after just 5 minutes of exposure.

• Binaural beats: A meta-analysis in Psychological Research (2019) confirmed measurable effects on mood and short-term cognition.

How we use them

At Ressonia, each generated composition is anchored to a Solfeggio tone chosen from your numerology, your astrological profile, and your stated intention. The result is music that resonates with you — not a generic playlist.