title: [Change of Fo and vocal range of pathological voice].
abstract: OBJECTIVE
  To study the relationship between Fo and true or falsetto range in four phonation modes.
  
  
  METHODS
  Testing Fo of lowest true voice, comfortable voice, highest true voice and falsetto voice.
  
  
  RESULTS
  In pathological voice, Fo of lowest true voice increases, Fo of highest falsetto voice reduces, true and falsetto voice range become thin and the change of falsetto voice range is more obvious.
  
  
  CONCLUSIONS
  Fo of falsetto highest voice reduces, falsetto voice rang become thin in pathological voice.
authors.affiliation: Department of Otolaryngology, No 202 Hospital of PLA, Shenyang 110003.
authors.forename: Z M
authors.initials: ZM
authors.lastname: Zhang
authors.forename: S L
authors.initials: SL
authors.lastname: Yang
mesh_terms: D000293:Adolescent; D000328:Adult; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D013018:Sound Spectrography; D014827:Vocal Cords / Q000503:physiopathology*; D014832:Voice Disorders / Q000503:physiopathology*; D014833:Voice Quality