Noise-to-harmonics ratio as an acoustic measure of voice disorders in boys

Noise-to-harmonics ratio as an acoustic measure of voice disorders in boys

Autor Jotz, Geraldo Pereira Google Scholar
Cervantes, Onivaldo Autor UNIFESP Google Scholar
Abrahão, Márcio Autor UNIFESP Google Scholar
Settanni, Flávio Aurélio Parente Autor UNIFESP Google Scholar
Angelis, Elisabete Carrara de Autor UNIFESP Google Scholar
Instituição Univ Vale Sapucai
Universidade Federal de São Paulo (UNIFESP)
Resumo This prospective study assessed the efficacy of computerized noise-to-harmonics ratio (NHR) to quantify perceptual and endoscopic findings of dysphonia and/or structural lesion of the vocal fold. Fifty Brazilian boys without vocal complaints were submitted to computerized, perceptual, and endoscopic examination. Thirty boys were dysphonic-3 were classified into the grade category, 5 into breathiness, 9 into roughness, and 15 into grade/breathiness. Vocal fold lesions were observed in 25 boys (17 nodules and 8 cysts). The Mann-Whitney U test revealed that NHR was significantly higher in boys with a structural lesion (p = 0.007) and in boys with dysphonia (p < 0.0001). However, according to a logistic regression model, only the occurrence of dysphonia was explained by NHR; the risk for having dysphonia increased approximately twice (odds ratio = 1.92, 95% confidence interval = 1.3-2.9) with each increase of 0.01 in NHR. Our results suggest that noise is a useful quantitative index to confirm a perceptual diagnosis of dysphonia and to evaluate quantitative changes in a dysphonic voice over time. However, we believe that computerized analysis should be used as a complement, rather than a substitute, for perceptual evaluation. Further studies with a larger sample are required to investigate the relationship between noise and lesions of the vocal folds.
Assunto children
voice disorders
male voice
flexible laryngoscopy
rough voice
perturbation
Idioma Inglês
Data 2002-03-01
Publicado em Journal Of Voice. Clifton Park: Singular Publishing Group Inc, v. 16, n. 1, p. 28-31, 2002.
ISSN 0892-1997 (Sherpa/Romeo, fator de impacto)
Editor Singular Publishing Group Inc
Extensão 12/12/18
Fonte http://dx.doi.org/10.1016/S0892-1997(02)00068-1
Direito de acesso Acesso restrito
Tipo Artigo
Web of Science WOS:000181346700004
URI http://repositorio.unifesp.br/11600/44792

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