Some Problems Associated with Current Methods for Examining Laryngeal Function

Abstract

This paper presents a critique of clinical methods currently used for assessment of laryngeal function. Acoustic, aerodynamic and perceptual analysis are discussed. It is suggested that acoustic analysis is limited relative to establishing a specific diagnosis but may have application in screening for laryngeal malignancy. The problems identified with aerodynamic assessment are those associated with the warm-wire anemometer. Criticisms of the perceptual scales widely adopted in Japan focus on the fact that parameters selected are arbitrary and other measures may be more precise in describing vocal hoarseness. Crossing all measures of vocal function is the need for standard calibration procedures. The authors conclude that considerable study is needed before laryngeal function tests can be considered a true clinical examination of the vocal system.