Leonardo FUKS , Britta HAMMARBERG, Johan SUNDBERG : A self-sustained vocal-ventricular phonation mode: acoustical, aerodynamic and glottographic evidences

A self-sustained vocal-ventricular phonation mode: acoustical, aerodynamic and glottographic evidences

Authors
Leonardo Fuks, Britta Hammarberg, Johan Sundberg
Publication date
1998/3
Journal
KTH TMH-QPSR
Volume
3
Issue
1998
Pages
49-59
Description
This investigation describes various characteristics of a particular phonation mode, vocal-ventricular mode (VVM), as produced by a healthy, musically-trained subject. This phonation mode was judged as perceptually identical to that used in the Tibetan chant tradition. VVM covered a range close to an octave, starting at about 50 Hz. High-speed glottography revealed that the ventricular folds oscillated at half the frequency of the vocal folds thus yielding a frequency of f/2. Phonation at f/3 was also possible. Presumably, aerodynamic forces produced by the glottal flow pulses sustained the vibrations of the ventricular folds. Complementary aspects of this type of phonation were compared to phonation in modal and pulse registers by acoustical analysis of the audio signal, by inverse filtering of the flow signal and by electroglottography (EGG). In addition, oesophageal pressures were measured. These analyses …
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