What defines the myo-elastic aerodynamic theory in relation to vocal fold behavior?

The myo-elastic aerodynamic theory describes vocal fold vibration as a product of the interplay between muscle tension (myo-elastic properties) and the aerodynamic forces created by airflow from the lungs. According to this theory, vocal folds are actively closed and tensed by the action of intrinsic laryngeal muscles during phonation. This tensing creates the necessary conditions for the vocal folds to oscillate, as the subglottic pressure builds up, forcing the folds apart and allowing them to vibrate as they come back together due to their elastic properties.

This active control allows for dynamic adjustments in pitch and loudness during speech and singing. Understanding this process is critical in voice science and helps elucidate how different aspects of voice production can be manipulated.

The other options do not capture this critical aspect of muscle control and the dynamic nature of vocal fold vibrating. While closed vocal folds and the role of air pressure are factors in phonation, they do not fully encompass the myo-elastic aerodynamic theory as effectively as the idea of active control and tension.