Effect of Artificially Lengthened Vocal Tract on Vocal Fold Oscillation's Fundamental Frequency

Investigação de efeitos imediatos de dois exercícios de trato vocal semi-ocluído

“…Other hypothesis is that the time of execution of the finger kazoo was not sufficient to present more evident results in women without complains. However, the auditory-perceptual assessment and the time variable have not been the focus of the studies about the subject (2,3,(5)(6)(7)10). New studies comparing the effects of the exercises depending on the execution time may clarify these issues.…”

“…The reactance is part of the resistance to the vocal production that is called impedance and allows saving the acoustic energy. This energy changes the glottal flow and the oscillatory characteristics of the vocal folds (2,7,10). The study of impedance represents an important step to understanding the benefits of the ESOVT.…”

“…Several authors studied the effects of ESOVT and reported, for example changes in the fundamental frequency (Fo) and positive changes in subjects with vocal cords mass lesions (2)(3)(4)(5)(6)(7)(8)(9)(10). However the effects of these exercises are still slightly known since the focus of the studies have been the use of computerized models and observation only during the performance of the exercises.…”

Vocal Fold Adjustment Caused by Phonation Into a Tube: A Double-Case Study Using Computed Tomography

“…These vocal tract changes were reported in the related studies of Vampola et al, 16 Guzman et al, 17 and Laukkanen et al 32 It is known that the vocal fold behavior can be considerably influenced by the interaction with the vocal tract. 2,18,19,33 The systematic changes in voice quality and vocal fold vibration reported in these subjects in the previous studies 16,17,32 seem therefore more likely to be caused by vocal tract changes and source-filter interaction effects rather than by the laryngeal muscle adjustments.…”

The effect of resonance tubes on facial and laryngeal vibration – A case study

“…The value of the estimated F1 frequency significantly varies in the literature [7,[11][12][13]. There is still no simple and recognized method of measuring this parameter when resonance tubes are used.…”