The high resolution frequency analyzer is used for the study of the vocal quality after partial laryngectomy. The post-operative plot after speech therapy is of good quality when respecting one vocal fold. On the contrary, the heard vocal sound does not correspond to the harmonics of the fundamental frequency but to intense noise from irregular vibrations of the residual laryngeal mucosa (ventricular folds, arytenoids). High resolution frequency analysis contributes to the follow-up of the partial laryngectomy.
Remacle, M., & Millet, B. (1991). Etude objective de la qualité de la voix après laryngectomie partielle. Acta Oto-Rhino-Laryngologica Belgica, 45(3), 305-309. https://hdl.handle.net/2078.5/68409 (Original work published 1991)