Aerodynamic Voice Assessment

Abstract

During voice production, the larynx acts as an energy transducer that converts aerodynamic energy from the lungs into acoustic energy heard as voice. The efficiency of this energy transduction is dependent on a variety of factors including glottal configuration, hydration, vocal fold tension, as well as the aerodynamic inputs of airflow and pressure. The aerodynamic inputs are analogous to an electrical circuit where airflow, subglottal pressure, and laryngeal resistance correspond to current, voltage, and resistance. Aerodynamic parameters that reflect the energy required to produce voice are helpful indicators of vocal function. Abnormal aerodynamic parameters have been demonstrated in the setting of numerous laryngeal pathologies including vocal nodules, polyps, and Reinke’s edema. Accordingly, aerodynamic measurement remains a critical component of the comprehensive voice assessment.