Minimum Airflow Rate During Phonation

Subglottal pressure and airflow measures during vocal fry phonation.

Clinical Evaluation of Air Usage during Phonation

For measuring air usage during phonation, we recorded the air volume curve as a function of time during sustained phonation by using a spirometer coupled with a simple electrical device. As an indirect estimation of air usage, the phonation quotient (PQ) was also calculated from the vital capacity (VC) and the maximum phonation time (MPT) ; PQ=VC/MPT. This paper reports on a comparative study o...

Airflow Rate Requirements in Passenger Aircraft

Dynamic Changes in Heart Rate Variability and Nasal Airflow Resistance during Nasal Allergen Provocation Test

Allergic rhinitis is a major chronic respiratory disease and an immunoneuronal disorder. We aimed at providing further knowledge on the function of the neural system in nasal allergic reaction. Here, a method to assess simultaneously the nasal airflow resistance and the underlying function of autonomic nervous system (ANS) is presented and used during the nasal provocation of allergic and nonal...

The Control of Airflow during Singing

In singing, subglottal (lung or tracheal) air pressures as high as 40 or 50 cm H20 have been reported in singing at high volume levels. Such pressures are approximately 3 to 4 times the pressures used for speech. It might be hypothesized that, if not controlled by appropriate compensatory mechanisms, the high airflows that could be caused by such pressures might be detrimental to the mucosa of ...