INTRODUCTION: The objective was to study the behavior of the larynx during shouted voice production, when the larynx is exposed to extremely high subglottic pressure. MATERIALS AND METHODS: The study involved electroglottographic, acoustic, and aerodynamic analyses of shouts produced at maximum effort by three male participants. RESULTS AND DISCUSSION: 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.
INTRODUCTION: The objective was to study the behavior of the larynx during shouted voice production, when the larynx is exposed to extremely high subglottic pressure. MATERIALS AND METHODS: The study involved electroglottographic, acoustic, and aerodynamic analyses of shouts produced at maximum effort by three male participants. RESULTS AND DISCUSSION: 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: N M Wilson; G B Marks; A Eckhardt; A M Clarke; F P Young; F L Garden; W Stewart; T M Cook; E R Tovey Journal: Anaesthesia Date: 2021-03-30 Impact factor: 12.893