Voice characteristics in the progression of Parkinson's disease.

  title={Voice characteristics in the progression of Parkinson's disease.},
  author={Raymond J Holmes and Jennifer M Oates and Debbie Phyland and Andrew J. Hughes},
  journal={International journal of language & communication disorders},
  volume={35 3},
This study examined the acoustic and perceptual voice characteristics of patients with Parkinson's disease according to disease severity. The perceptual and acoustic voice characteristics of 30 patients with early stage PD and 30 patients with later stage PD were compared with data from 30 normal control subjects. Voice recordings consisted of prolongation of the vowel /a/, scale singing, and a 1-min monologue. In comparison with controls and previously published normative data, both early and… CONTINUE READING


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