Tracking Voice Change after Thyroidectomy: Application of Spectral/Cepstral Analyses

Autor/inn/en	Awan, Shaheen N.; Helou, Leah B.; Stojadinovic, Alexander; Solomon, Nancy Pearl
Titel	Tracking Voice Change after Thyroidectomy: Application of Spectral/Cepstral Analyses
Quelle	In: Clinical Linguistics & Phonetics, 25 (2011) 4, S.302-320 (19 Seiten) PDF als Volltext Verfügbarkeit
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	0269-9206
DOI	10.3109/02699206.2010.535646
Schlagwörter	Sentences; Vowels; Surgery; Patients; Acoustics; Severity (of Disability); Information Technology; Computer Software; Diagnostic Tests; Speech Evaluation; Speech Impairments; Speech Language Pathology; Measures (Individuals); Longitudinal Studies; Measurement Equipment; Adults; Measurement Techniques; Perception Tests; Statistical Analysis; District of Columbia; Pennsylvania + Suchen Sie Ihr Suchwort? Sentence analysis; Satzanalyse; Chirurgie; Patient; Akustik; Schweregrad; Informationstechnologie; Diagnostic test; Diagnostischer Test; Speech impairment; Speech handicap; Speech handicaps; Language handicps; Language impairments; Sprachbehinderung; Messdaten; Longitudinal study; Longitudinal method; Longitudinal methods; Längsschnittuntersuchung; Messinstrument; Messtechnik; Statistische Analyse
Abstract	This study evaluates the utility of perioperative spectral and cepstral acoustic analyses to monitor voice change after thyroidectomy. Perceptual and acoustic analyses were conducted on speech samples (sustained vowel /[alpha]/ and CAPE-V sentences) provided by 70 participants (36 women and 34 men) at four study time points: prior to thyroid surgery and 2 weeks, 3 months and 6 months after thyroidectomy. Repeated measures analyses of variance focused on the relative amplitude of the dominant harmonic in the voice signal (cepstral peak prominence, CPP), the ratio of low-to-high spectral energy, and their respective standard deviations (SD). Data were also examined for relationships between acoustic measures and perceptual ratings of overall severity of voice quality. Results showed that perceived overall severity and the acoustic measures of the CPP and its SD (CPPsd) computed from sentence productions were significantly reduced at 2-week post-thyroidectomy for 20 patients (29% of the sample) who had self-reported post-operative voice change. For this same group of patients, the CPP and CPPsd computed from sentence productions improved significantly from 2-weeks post-thyroidectomy to 6-months post-surgery. CPP and CPPsd also correlated well with perceived overall severity (r = -0.68 and -0.79, respectively). Measures of CPP from sustained vowel productions were not as effective as those from sentence productions in reflecting voice deterioration in the post-thyroidectomy patients at the 2-week post-surgery time period, were weaker correlates with perceived overall severity, and were not as effective in discriminating negative voice outcome (NegVO) from normal voice outcome (NormVO) patients as compared to the results from the sentence-level stimuli. Results indicate that spectral/cepstral analysis methods can be used with continuous speech samples to provide important objective data to document the effects of dysphonia in a post-thyroidectomy patient sample. When used in conjunction with patient's self-report and other general measures of vocal dysfunction, the acoustic measures employed in this study contribute to a complete profile of the patient's vocal condition. (Contains 1 note, 2 tables and 7 figures.) (As Provided).
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Update	2017/4/10