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Revista da Sociedade Brasileira de Fonoaudiologia
On-line version ISSN 1982-0232
OLIVEIRA, Bruna Ferreira Valenzuela de; SOARES, Erika Queiroga Werkhaizer; AZEVEDO, Luciana Lemos de and BRITTO, Denise Brandão de Oliveira e. Analysis of acoustic and auditory-perceptual parameters in stutterers. Rev. soc. bras. fonoaudiol. [online]. 2009, vol.14, n.3, pp.323-331. ISSN 1982-0232. http://dx.doi.org/10.1590/S1516-80342009000300007.
PURPOSE: To analyze auditory-perceptual and acoustic parameters of the voices of adult stutterers. METHODS: Fifteen male stutterers in the age range from 21 to 41 years (mean 26.6 years), attended at the institution's Speech-Language Pathology Clinical Center in the period from February 2005 to July 2007, were analyzed. The auditory-perceptual parameters analyzed were vocal quality, type of voice, resonance, vocal tension, speech rate, pneumo-phonic coordination, vocal attack and pitch range; the acoustic parameters analyzed were fundamental frequency and its variability during spontaneous speech. RESULTS: The auditory-perceptual analysis showed that the most frequent characteristics among the subjects were normal vocal quality (60%), altered resonance (66%), vocal tension (86%), altered vocal attack (73%), normal speech rate (54%), altered pitch range (80%) and altered pneumo-phonic coordination (100%). However, only the presence of vocal tension and the altered pneumo-phonic coordination and pitch range were statistically significant in the stutterers studied. In the acoustic analysis, fundamental frequency varied from 125,54 to 149,59 Hz, and the variability of the fundamental frequency ranged from 16 to 21 halftones, or from 112,50 to 172,40 Hz. CONCLUSION: The auditory-perceptual parameters that were significantly frequent among stutterers were: presence of vocal tension, altered pneumo-phonic coordination, and altered pitch range. Therefore, it is important to evaluate the vocal aspects of these patients, for the fluency disorders might undermine some vocals parameters, causing dysphonia.
Keywords : Voice; Stuttering; Respiration; Phonation; Speech acoustics; Auditory perception.