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Effects of vocal intensity and physi...

Ziegler, Aaron Scott.

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Effects of vocal intensity and physical activity levels on phonatory and respiratory function.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Effects of vocal intensity and physical activity levels on phonatory and respiratory function./
作者:	Ziegler, Aaron Scott.
面頁冊數:	258 p.
附註:	Source: Dissertation Abstracts International, Volume: 76-05(E), Section: B.
Contained By:	Dissertation Abstracts International76-05B(E).
標題:	Speech therapy. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3648139
ISBN:	9781321430233

Effects of vocal intensity and physical activity levels on phonatory and respiratory function.
Ziegler, Aaron Scott.

Effects of vocal intensity and physical activity levels on phonatory and respiratory function. - 258 p.

Source: Dissertation Abstracts International, Volume: 76-05(E), Section: B.

Thesis (Ph.D.)--University of Pittsburgh, 2014.

The vocal folds act as gatekeeper to the flow of air into and out of the lower airway. Another function of the vocal folds is that of oscillating sound source. To date, research has shown that under high respiratory drive (HRD) conditions voice is breathy, suggesting respiratory function will be favored over voice as physiologic needs increase. The problem is for physically active voice users acoustic goals are relatively fixed. This study used a "physiology of activity" paradigm within action theory to investigate the extent to which phonatory and respiratory functions may be affected by systemically varying vocal and metabolic goals. Thirty-two English-speaking females, ages 18-35 years, who were vocally untrained and recreationally active, participated in the study. Participants produced sets of seven consonant-vowel syllables, at rest, using a pre-determined pitch at a comfortable loudness and in a loud voice. Following, participants walked on a treadmill to achieve low and high workloads at established speed and grade adjustments. The same speech task was repeated, using the same vocal intensities. Order of vocal and exercise intensities were counterbalanced. In terms of phonatory function, Rlaw increased significantly more from a baseline of spontaneous voice at rest during loud voice compared to spontaneous voice, mediated by an increase in Ps. Moreover, Rlaw decreased significantly more from baseline with an increase in workload, resulting in increases in metabolic variables. The decrease in Rlaw coincided with numerical increases in airflow. Voice production, as compared to breathing, reduced Ve, interfering with gas exchange. No differences existed for metabolic variables between voice conditions. This study reflected an attempt to understand the impact of goal-oriented behavior on phonatory and respiratory functions during HRD by manipulating vocal and metabolic goals. Consistent with prior research, voice, as opposed to breathing, resulted in airflow limitation during HRD, reducing ventilation and CO2 clearance. Extreme respiratory perturbations lead to decreases in phonatory function to support metabolic needs. As predicted by action theory, loud voice appeared to favor phonatory function when vocal goal was specified, at least for a short duration. Conversely, spontaneous voice demonstrated deference to respiratory function when vocal goal remained unspecified.

ISBN: 9781321430233Subjects--Topical Terms:

520446
Speech therapy.

Effects of vocal intensity and physical activity levels on phonatory and respiratory function.
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