A more theoretical and complementary area of practice involves the concept of the Biofield or Energy Medicine, which posits that living systems are surrounded and permeated by fields of energy and information that can be manipulated to influence health and healing. While this concept is not fully substantiated by mainstream scientific evidence, its practitioners utilize sound and vibration instruments based on the principle of resonance and coherence.

• Resonance Principle: The idea is that illness or imbalance is associated with disharmony in the body’s natural vibrational state. Specific tones (e.g., those produced by tuning forks tuned to specific mathematical or astronomical frequencies, or specific musical intervals) are applied to the body or held in the surrounding field to "retune" the body's internal frequencies, aiming for a return to a state of equilibrium or harmony.

• Energetic Centers (Chakras): Many practitioners associate specific notes, frequencies, or instruments with traditional energetic centers, using sound to clear perceived blockages and restore the flow of "vital energy."

Techniques within this framework often include using weighted tuning forks applied directly to the body, chanting, or toning (extended vocalization of vowels). While the subjective experience for participants frequently includes deep relaxation, tingling, and a sense of "energy release," the physiological mechanisms are not yet fully defined or accepted by conventional medicine, which typically attributes the positive outcomes to nervous system regulation (parasympathetic activation) and the placebo effect. This intersection of ancient belief systems and modern acoustic practice is an area of continuous exploration and discussion, as detailed in reports focusing on complementary modalities, such as the analysis available at this link: Sound Therapy Clinical Insights.