title: An aerodynamic study of labial stop consonants after laser cordectomy of types II-III.
abstract: OBJECTIVE
  The aim of this paper is to compare the aerodynamic parameters of intraoral pressure (IOP), oral airflow (OAF), and estimated transglottal pressure of 10 French patients treated by a cordectomy of types II-III with a group of 10 French healthy subjects.
  
  
  METHODS
  Prospective.
  
  
  METHODS
  The collection of the aerodynamic data was conducted with EVA2. Parameters were measured using logatomes of the type CV1·CV2·CVC3 where C represents [p,b] and V is one of the vowels [a,i,u] in the positions one and two (n = 240). The maximum peaks of IOP of the plosives [p] and [b] and the maximum peaks of OAF at their releases were extracted. Finally, the transglottal pressure was estimated, necessary for the voicing of [b], to establish the difference in the IOP mean peak of [p] and [b] at the same intensity. Subsequently, the differences in IOP for both positions and each vocalic contexts, "IOP(p-b)" were calculated, and the reports of these differences for the IOP of [p], viz "IOP(p-b)/IOP(p)", were established for a normalization of the results.
  
  
  RESULTS
  This study highlights an increase of the IOP and the OAF in voiceless contexts for both groups. The elevation of both parameters observed for the patients-confirmed by the calculation of the estimated transglottal pressure-does show some degree of laryngeal incompetence.
  
  
  CONCLUSIONS
  The patients treated by cordectomy of types II-III maintain a relatively good voicing contrast. A certain difficulty in the execution of this articulatory feature is found.
authors.affiliation: Laboratoire de Phonétique et Phonologie, UMR 7018 (CNRS/Sorbonne-Nouvelle), Paris, France. Electronic address: lucille.wallet@univ-paris3.fr.
authors.forename: Lucille
authors.initials: L
authors.lastname: Wallet
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D005260:Female; D006801:Humans; D007830:Larynx / Q000503:physiopathology / Q000601:surgery*; D053685:Laser Therapy / Q000379:methods*; D008297:Male; D008875:Middle Aged; D010699:Phonation / Q000502:physiology*; D011312:Pressure; D011446:Prospective Studies; D013018:Sound Spectrography; D013061:Speech Acoustics; D014827:Vocal Cords / Q000503:physiopathology / Q000601:surgery*; D014831:Voice / Q000502:physiology*; D014832:Voice Disorders / Q000503:physiopathology / Q000601:surgery*
keywords: Aerodynamic; Cordectomies; Estimated transglottic pressure; Intraoral pressure; Oral airflow