title: Objective voice changes in nondysphonic Parkinson's disease patients.
abstract: OBJECTIVE
  To obtain objective acoustic analysis results from Parkinson's disease patients who do not have voice symptoms and to compare these results with those from age- and sex-matched control subjects.
  
  
  METHODS
  Prospective.
  
  
  METHODS
  Tertiary reference hospital.
  
  
  METHODS
  The objective acoustic analysis results from 14 female Parkinson's disease patients with no voice symptoms were compared with those of 22 age- and sex-matched normal subjects.
  
  
  RESULTS
  Statistical analysis revealed no differences in mean fundamental frequency and shimmer values. However, differences in jitter values, loudness, and the harmonics to noise ratio were statistically significant between the two groups (p < .05).
  
  
  CONCLUSIONS
  With this study, it was shown that Parkinson's disease patients who do not have any voice symptoms have objectively different acoustic values than their age- and sex-matched controls. Clinicians must be aware of these initial findings on the voice changes of Parkinson's disease patients.
authors.affiliation: Department of Otolaryngology, Saglik Bakanligi Ankara Training and Research Hospital, Ankara, Turkey. drhoguz@gmail.com
authors.forename: Haldun
authors.initials: H
authors.lastname: Oguz
authors.forename: Tugba
authors.initials: T
authors.lastname: Tunc
authors.forename: Mustafa Asim
authors.initials: MA
authors.lastname: Safak
authors.forename: Levent
authors.initials: L
authors.lastname: Inan
authors.forename: Selda
authors.initials: S
authors.lastname: Kargin
authors.forename: Munir
authors.initials: M
authors.lastname: Demirci
mesh_terms: D000368:Aged; D005260:Female; D006801:Humans; D008875:Middle Aged; D010300:Parkinson Disease / Q000503:physiopathology*; D011446:Prospective Studies; D014831:Voice / Q000502:physiology*