A single archaeoacoustic tone: 111 Hz, the resonance measured in ancient stone chambers such as Malta's Hypogeum. Researchers measuring the acoustics of Neolithic chambers, most famously the Ħal Saflieni Hypogeum in Malta, have reported a strong resonance near 110–111 Hz, a pitch that a low male voice can excite by chanting. Whether the builders tuned the rooms deliberately is unknown; the frequency's devotional reputation is modern. It is offered here as a resonance with a long echo, not a proven design. Independent of any tradition, controlled clinical evidence that a specific frequency produces a specific health effect is limited and mixed. Auriviel presents these tunings as music and contemplative practice. This page is for general information and relaxation. Auriviel's frequency music is not medical advice, diagnosis, or treatment, and no health outcome is claimed. If you have a medical concern, please consult a qualified professional.