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Frazer Thesis 2july2014.pdf (2.3 MB)

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Approximating Subglottal Pressure from Oral Pressure: A Methodological Study

Frazer, Brittany L
http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1403711283

Abstract Details

2014, Master of Science (MS), Bowling Green State University, Communication Disorders/Speech-Language Pathology.
The most frequently used method to estimate subglottal pressure noninvasively is to have a person smoothly utter CVCV; strings such that the subglottal pressure remains nearly constant throughout the utterance of the string, as in smoothly saying /p:i:p:i:p:i:/, and an oral pressure transducer is used to estimate the subglottal air pressure during the vowels by measuring the oral pressures during the consonants. The current investigation sought to determine the accuracy of estimates of subglottal pressure for various conditions, namely, whether or not the subjects are trained in the use of a standard utterance, increasing syllable rate, using a voiced /b/ instead of a voiceless /p/ initial syllable, adding a lip or velar leak, or using a two syllable production instead of a single syllable production. 10 subjects (5 males and 5 females) volunteered for this study (results for 3 males and 3 females are reported here). The subglottal pressure was estimated from the oral pressure during lip occlusion, and the syllable rate and lip closed quotient (the duration the lips are closed divided by the syllable duration) were obtained for all subjects. Lip leak, velar leak, and lack of time to equilibrate air pressure throughout the airway caused estimates of subglottal pressure to be inaccurate. A wide range of syllable rates provided relatively accurate results. In addition, the use of the voiced initial consonant /b/ and the two-syllable word "peeper" appeared to create acceptable estimates of subglottal pressure from oral pressure. Training improved the consistency of the oral pressure profiles and thus the assurance in estimating the subglottal pressure. Numerous pressure profile shapes during lip occlusion are discussed.
Ronald Scherer, Ph.D. (Advisor)
John Folkins, Ph.D. (Committee Member)
Alexander Goberman, Ph.D. (Committee Member)
122 p.
Speech Therapy
subglottal pressure; speech methodology; voice production; voice; speech aerodynamics; speech; oral air pressure; measurements of speech; multi-signal speech recordings; phonation; larynx; tracheal pressure; bilabial consonant

Recommended Citations

Citations

  • Frazer, B. L. (2014). Approximating Subglottal Pressure from Oral Pressure: A Methodological Study [Master's thesis, Bowling Green State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1403711283

    APA Style (7th edition)

  • Frazer, Brittany. Approximating Subglottal Pressure from Oral Pressure: A Methodological Study. 2014. Bowling Green State University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1403711283.

    MLA Style (8th edition)

  • Frazer, Brittany. "Approximating Subglottal Pressure from Oral Pressure: A Methodological Study." Master's thesis, Bowling Green State University, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1403711283

    Chicago Manual of Style (17th edition)

bgsu1403711283
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This open access ETD is published by Bowling Green State University and OhioLINK.