Left inferior frontal area responsible for language production. Plans and coordinates articulatory movements. ORAVYS detects micro-variations in prosody, flow and pauses revealing cognitive load, stress and brain fatigue.
Direct control of facial, lingual and laryngeal muscles. Somatotopic map with enlarged representation for orofacial region. Disturbances in motor execution are visible in articulatory precision.
Analysis of tempo variations, vocal intensity, phonemic transitions and pauses. These markers reveal brain activity, emotional states and neurological conditions.
Transmits nerve signals from brain to respiratory and postural muscles. Spinal nerves (C1-C7, T1-T12) innervate the diaphragm and intercostal muscles essential for breathing.
Innervates the diaphragm from cervical vertebrae. Essential breathing control. Any cervical compression or tension affects vocal respiratory support.
Vibration of vocal folds at 80-250 Hz depending on gender and age. ORAVYS measures jitter (F0 variation), shimmer (amplitude) and HNR (harmonic-to-noise ratio).
4 intrinsic muscles change shape, 4 extrinsic control position. Lingual position modifies acoustic formants F1, F2, F3.
Total volume 4-6 liters in adults. Vital capacity determines maximum phonation duration. ORAVYS measures inspiration/expiration ratios and airflow stability.
5-10 cmH2O for normal speech. 15-30 cmH2O for singing or projection. Unstable pressure = trembling or fatigued voice.
60-100 bpm at rest, increases to 120+ under stress. Cardiac pulsation creates detectable vocal micro-tremors in the fundamental frequency.
Micro-tremors at heart rate frequency (4-8 Hz), HRV variability and cardio-respiratory coupling reveal autonomic stress and cardiovascular health.
Legs provide essential postural stability for effective phonation. A stable standing position allows optimal thoracic expansion and maximal vocal projection.
The entire body acts as a resonance chamber. Vibrations propagate from vocal cords through the skeleton. Leg position influences global resonance and timbre.