Cepstral analysis in patients with a vocal fold motility impairment: advantages of the cepstrum over time-based acoustic
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LARYNGOLOGY
Cepstral analysis in patients with a vocal fold motility impairment: advantages of the cepstrum over time‑based acoustic analysis Beatriz Delgado‑Vargas1 · Leticia Acle‑Cervera2 · Lorena Sánz‑López2 · Mireya Bonet‑Loscertales3 · Narcisa Pérez‑Naranjo4 · Patricia Fuentes‑Navajo4 Received: 16 May 2020 / Accepted: 11 August 2020 © Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract Objectives To determine the usefulness of the smoothed cepstral peak prominence (CPPS) in sustained vowel as objective measure of dysphonia. Study design This is a retrospective cohort study. 49 patients presenting a vocal cord motility impairment between 2012 and 2018 were included. Methods Classical acoustic parameters, including jitter, shimmer and NHR, as well as the CPPS were obtained for each patient with a vocal cord motility impairment confirmed by means of a fiberoptic laryngoscopy. We calculated the S/E ratio of each patient to establish the glottal efficiency. An independent sample t test and a Pearson correlation test were used to compare data. Results Patients presenting a vocal cord motility impairment present abnormal values of the CPPS. Those patients presenting a vocal cord paralysis present lower values of those presenting a vocal cord paresis, with statistically significant difference (P
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