title: The shouted voice: A pilot study of laryngeal physiology under extreme aerodynamic pressure.
abstract: BACKGROUND
  The objective was to study the behavior of the larynx during shouted voice production, when the larynx is exposed to extremely high subglottic pressure.
  
  
  METHODS
  The study involved electroglottographic, acoustic, and aerodynamic analyses of shouts produced at maximum effort by three male participants.
  
  
  CONCLUSIONS
  Under a normal speaking voice, the voice sound pressure level (SPL) is proportional to the subglottic pressure. However, when the subglottic pressure reached high levels, the voice SPL reached a maximum value and then decreased as subglottic pressure increased further. Furthermore, the electroglottographic signal sometimes lost its periodicity during the shout, suggesting irregular vocal fold vibration.
authors.affiliation: a Service d'ORL et Chirurgie cervico-faciale, CHU de Liège , Belgium.|b Laboratoire Parole et Langage, UMR 7309, CNRS-AMU , Aix en Provence , France.
authors.forename: Aude
authors.initials: A
authors.lastname: Lagier
authors.affiliation: b Laboratoire Parole et Langage, UMR 7309, CNRS-AMU , Aix en Provence , France.
authors.forename: Thierry
authors.initials: T
authors.lastname: Legou
authors.affiliation: b Laboratoire Parole et Langage, UMR 7309, CNRS-AMU , Aix en Provence , France.|c Service d'ORL et Chirurgie cervico-faciale, CHU Timone, AP-HM , Marseille , France.
authors.forename: Camille
authors.initials: C
authors.lastname: Galant
authors.affiliation: b Laboratoire Parole et Langage, UMR 7309, CNRS-AMU , Aix en Provence , France.|c Service d'ORL et Chirurgie cervico-faciale, CHU Timone, AP-HM , Marseille , France.
authors.forename: Benoit
authors.initials: B
authors.lastname: Amy de La Bretèque
authors.affiliation: b Laboratoire Parole et Langage, UMR 7309, CNRS-AMU , Aix en Provence , France.
authors.forename: Yohann
authors.initials: Y
authors.lastname: Meynadier
authors.affiliation: b Laboratoire Parole et Langage, UMR 7309, CNRS-AMU , Aix en Provence , France.|c Service d'ORL et Chirurgie cervico-faciale, CHU Timone, AP-HM , Marseille , France.
authors.forename: Antoine
authors.initials: A
authors.lastname: Giovanni
mesh_terms: D000162:Acoustics; D000328:Adult; D004568:Electrodiagnosis; D006801:Humans; D007830:Larynx / Q000502:physiology*; D008297:Male; D008875:Middle Aged; D010507:Periodicity; D010699:Phonation; D010865:Pilot Projects; D000074286:Preliminary Data; D011312:Pressure; D013018:Sound Spectrography; D013997:Time Factors; D014732:Vibration; D014827:Vocal Cords / Q000502:physiology; D014833:Voice Quality
keywords: Electroglottography; laryngeal physiology; shout; shouted voice; subglottic pressure