Aerodynamic Demand Responses to the Fluid Interval Test for Voice: A Laryngeal Diadochokinetic Vocal Loading Task.
Saved in:
| Title: | Aerodynamic Demand Responses to the Fluid Interval Test for Voice: A Laryngeal Diadochokinetic Vocal Loading Task. |
|---|---|
| Authors: | Apfelbach, Christopher S.1 apfel014@umn.edu, Sandage, Mary J.2, Abbott, Katherine Verdolini3 |
| Source: | Journal of Speech, Language & Hearing Research. May2026, Vol. 69 Issue 5, p1880-1901. 22p. |
| Subject Terms: | *Data analysis, *Universities & colleges, *Fatigue (Physiology), *Voice disorders, *Longitudinal method, *Experimental design, *College students, *Comparative studies, Laryngeal physiology, Task performance, Physiological adaptation, Research funding, Spirometry, Aerodynamics, Dynamics, Respiration, Two-way analysis of variance, Descriptive statistics, Physiological aspects of speech, Crossover trials, Sound recordings, Aerodynamic load, Statistics, Human voice, Data analysis software, Time, Respiratory mechanics |
| Geographic Terms: | Delaware |
| Abstract: | Introduction: Vocal loading tasks are useful for studying vocal demand responses—the unique sets of biomechanical, aerodynamic, and acoustic adaptations that speakers employ to meet the vocal demands of communication. We discuss aerodynamic demand responses to the Fluid Interval Test for Voice (FIT-V), a vocal loading task founded on resisted laryngeal diadochokinesis (LDDK), to determine how aerodynamic factors may influence LDDK performance. Method: Participants (N = 30) produced loud abductory LDDK (/hʌ hʌ hʌ/) for 30 min, alternating 30-s intervals of exercise and rest. Depending on the task condition, fluid back pressure of 0 or 5 cm H2O was imposed to modulate respiratory demand. Airflow data were captured continuously and analyzed using a twoway analysis of variance (Task × Time) to characterize aerodynamic adaptations in both LDDK pulses and whole breath grou ps. Results: Instantaneous LDDK rate did not change significantly within trials or intervals—unlike the aerodynamic variables, which exhibited task- and timedependent changes. Large increases in mean airflow and expiratory volume within trials were characteristic of the resisted FIT-V5 task, whereas the nonresisted FIT-V0 task exhibited declining mean airflow and expiratory volume. Irrespective of task, all breath groups grew shorter within trials, and all aerodynamic variables decreased dramatically within intervals. Conclusions: Voice users actively modulated their aerodynamic output at multiple levels throughout the FIT-V tasks, although it is unclear whether these modulations were responsible for participants’ ability to maintain rapid LDDK rates. Future work will examine how different vocal demand responses influence perceived fatigue, performance fatigability, and laryngeal pathology risk. [ABSTRACT FROM AUTHOR] |
| Copyright of Journal of Speech, Language & Hearing Research is the property of American Speech-Language-Hearing Association and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Education Research Complete |
Be the first to leave a comment!
