Glossary & Terms
Clear definitions of the most important technical terms from frequency therapy, neurophysiology and sound medicine.
14 entries · alphabetically sorted
- Binaural Beats
- Acoustic illusion in the brain: When both ears hear slightly different tones, a difference frequency is created internally (e.g., 10 Hz = Alpha). Requires stereo headphones.
- Brainwave Entrainment
- The tendency of the brain to synchronize its wave activity with an external rhythm. Measurable on EEG as Frequency Following Response (FFR).
- EEG (Electroencephalogram)
- Measurement of electrical brain activity via electrodes on the scalp. Gold standard for detecting brainwave entrainment effects.
- Frequency Following Response (FFR)
- Brain response to rhythmic stimulation: Neural activity synchronizes with the stimulus frequency. Basis for Binaural Beats and Isochronic Tones.
- HRV (Heart Rate Variability)
- Fluctuations between heartbeats in milliseconds. High HRV = healthy autonomic nervous system. Clinical marker for stress reduction and vagal tone.
- Isochronic Tones
- Regularly pulsed single tones (e.g., 40 clicks/sec = 40 Hz). Work via ASSR mechanism, no headphones required.
- Microglia
- Immune cells of the brain. Phagocytize cell debris and amyloid-beta plaques. Activated by 40 Hz gamma entrainment (MIT GENUS research).
- PEMF (Pulsed Electromagnetic Field)
- Pulsed electromagnetic field. FDA-approved since 1979 for fracture healing. Induces weak currents in biological tissue.
- Piezoelectricity
- Electrical charge created by mechanical deformation. Collagen in bones is piezoelectric – basis for PEMF therapy and bone healing.
- Placebo Effect
- Measurable physiological effect through expectation (endogenous opioids, dopamine). Not ineffective – but isolated through control groups in serious research.
- Schumann Resonance
- Electromagnetic resonance between Earth's surface and ionosphere at 7.83 Hz. Natural field in which the human nervous system evolved.
- Solfeggio Frequencies
- Frequency series (174, 285, 396, 417, 528, 639, 741, 852, 963 Hz) with modern wellness claims. Historical origin not verifiable; individual frequencies (528 Hz) have real study data.
- TTFields (Tumor Treating Fields)
- High-frequency alternating electric fields (100–300 kHz). FDA-approved for glioblastoma (2011). Prevent cancer cells from dividing.
- Vagus Nerve
- Cranial nerve X: connects brainstem with heart, lungs and gut. 80% of its fibers are afferent (body→brain). Deep tones directly stimulate its ear branch.