The quantitative analysis of dysphonia.

A clinical method of measuring 'hoarseness' is presented. Its value is assessed in 3 different types of vocal cord lesion and compared against normal values. There are shown to be significant differences between the normal and the abnormal voice and also differences between each type of vocal cord lesion. We feel that this quantification of hoarseness is useful in the treatment of patients as well as in monitoring their progress under therapy.