Abstract
It has been known that the height of the dominant cepstral peak (C1) is related to perturbation of acoustic speech. In this paper, the possibility of applying C1 to evaluate hoarseness was investigated clinically.
The voice materials were obtained from 100 normal adults for control, and from 105 patients with various laryngeal diseases. The acoustic speech signals were analyzed. The normal group was differentiated from the laryngeal disease group by C1 as well as by PPQ and APQ. However, C1 was the most effective factor to distinguish the normal group from the laryngeal disease groups. On the other hand, C1 increased after laryngomicrosurgery of benign laryngeal lesions. As the degree of perceived hoarseness increased, C1 decreased.
The results suggest that cepstrum might be useful for the screening of pathologic voice, assessment of the success of surgeries for benign lesions of vocal cords, and psychophysical measurement of hoarseness.
