936 Hz is sometimes referred to as the "Pineal Gland Frequency" — a tone believed to stimulate the small, pinecone-shaped gland at the centre of the brain that has fascinated mystics and scientists alike for millennia. Descartes called it the "seat of the soul," and many spiritual traditions associate the pineal gland with the third eye — the organ of inner vision and spiritual sight.

In sound healing, 936 Hz is used to activate and "decalcify" the pineal gland, with the intention of sharpening intuition, enhancing dream recall, and opening the practitioner to states of heightened spiritual awareness. It is closely related to the Solfeggio frequency of 852 Hz, which also targets the third eye chakra, but 936 Hz is considered more specifically focused on the physical gland itself.

The tone is clear and bright, sitting just below the highest Solfeggio frequency (963 Hz). Many practitioners use it in the evening before sleep, believing it enhances the quality and vividness of dreams, or during meditation sessions focused on developing clairvoyance and spiritual perception.