Voice is a major means of communication for humans, non-human mammals and many
other vertebrates like birds and anurans. The physical and physiological principles of voice …

Purpose Maximum flow declination rate (MFDR) in the glottis is known to correlate strongly
with vocal intensity in voicing. This declination, or negative slope on the glottal airflow …

Purpose Voice therapy with a semi-occluded vocal tract has a long history. The use of lip
trills, tongue trills, bilabial fricatives, humming, and phonation into tubes or straws has been …

A theory of interaction between the source of sound in phonation and the vocal tract filter is
developed. The degree of interaction is controlled by the cross-sectional area of the …

OBJECTIVE: The present study aimed to investigate the vocal tract and glottal function
during and after phonation into a tube and a stirring straw. METHODS: A male classically …

Many common voice disorders are chronic or recurring conditions that are likely to result
from faulty and/or abusive patterns of vocal behavior, referred to generically as vocal …

Introduction Semi-occluded vocal tract exercises (SOVTE) are often used in voice clinics.
SOVTE change the acoustic vocal tract impedance in relation to the glottis impedance …

Resonant voice, often described in terms of vibratory sensations in the face, is investigated
acoustically by calculating vocal tract inertance. It appears that the ease of production and …

Phonation into glass tubes, keeping the free end of the tube in water, has been a frequently
used voice therapy method in Finland for more than four decades. These so-called …

Purpose Clinical trials have demonstrated that standardized voice treatment programs are
effective for some patients, but identifying the unique individual treatment ingredients …