Voice Training and Therapy With a Semi-Occluded Vocal Tract: Rationale and Scientific Underpinnings

Abstract

The efficacious effects of a lip semi-occlusion can also be realized for nonoccluded vocal tracts by a combination of vocal fold adduction and epilarynx tube adjustments. It is reasoned that therapy approaches are designed to match the glottal impedance to the input impedance of the vocal tract.