title: Acoustic and perceptual characteristics of the voice in patients with vocal polyps after surgery and voice therapy.
abstract: OBJECTIVE
  The aim of the study was to assess the effect of endolaryngeal phonomicrosurgery (EPM) and voice therapy in patients with vocal fold polyps using perceptual and acoustic analysis before and after both therapies.
  
  
  METHODS
  The acoustic tests and perceptual evaluation of voice were carried out on 41 female patients with vocal fold polyp before and after EPM and voice therapy. Both therapy strategies were performed. Used acoustic parameters were Jitter percent (Jitt), pitch perturbation quotient (PPQ), shimmer percent (Shim), amplitude perturbation quotient (APQ), fundamental frequency variation (vF0), noise-to-harmonic ratio (NHR), Voice Turbulence Index (VTI). For perceptual evaluation, GRB scale was used.
  
  
  RESULTS
  Results indicated higher values of investigated parameters in patients' group than in the control group (P < 0.01). Good correlation between the perceptual hoarseness factors of GRB scale and objective acoustic voice parameters were observed. All analyzed acoustic parameters improved after the phonomicrosurgery and voice therapy and tend to approach to values of the control group. For Jitt percent, Shim percent, vF0, VTI, and NHR, there were statistically significant differences. Perceptual voice evaluation revealed statistically significantly (P < 0.01) decreased rating of G (grade), R (rough) and B (breathy) after surgery and voice therapy.
  
  
  CONCLUSIONS
  Our data indicated that both acoustic and perceptual characteristic of voice in patients with vocal polyps significantly improved after phonomicrosurgical and voice treatment.
authors.affiliation: Faculty of Special Education and Rehabilitation, University of Belgrade, Belgrade, Serbia; ENT Clinic, Zvezdara Hospital and Clinical Centre, Belgrade, Serbia.
authors.forename: Mirjana
authors.initials: M
authors.lastname: Petrovic-Lazic
authors.affiliation: Faculty of Special Education and Rehabilitation, University of Belgrade, Belgrade, Serbia.
authors.forename: Nadica
authors.initials: N
authors.lastname: Jovanovic
authors.affiliation: Faculty of Medicine, University of East Sarajevo, Republic of Srpska, Bosna and Hercegovina.
authors.forename: Milan
authors.initials: M
authors.lastname: Kulic
authors.affiliation: ENT Clinic, Zvezdara Hospital and Clinical Centre, Belgrade, Serbia.
authors.forename: Snezana
authors.initials: S
authors.lastname: Babac
authors.affiliation: Faculty of Medical Sciences, University of Kragujevac, Kragujevac, Serbia. Electronic address: vdvd@mailcity.com.
authors.forename: Vladimir
authors.initials: V
authors.lastname: Jurisic
mesh_terms: D000293:Adolescent; D000328:Adult; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008875:Middle Aged; D010465:Perception / Q000502:physiology*; D011127:Polyps / Q000503:physiopathology / Q000601:surgery*; D013061:Speech Acoustics; D014827:Vocal Cords / Q000503:physiopathology / Q000601:surgery*; D014831:Voice / Q000502:physiology*; D014832:Voice Disorders / Q000503:physiopathology / Q000601:surgery*; D014833:Voice Quality; D055815:Young Adult
keywords: Acoustic voice analysis; Perceptual voice evaluation; Phonomicrosurgery; Vocal polyps; Voice