Quantifying the Perceptual Quality of Strain: An Electroglottographic Analysis of Continuous Dysphonic Speech
| dc.contributor.advisor | Mau, Ted | en |
| dc.creator | Somanath, Keerthan | en |
| dc.date.accessioned | 2017-06-02T15:26:59Z | |
| dc.date.available | 2017-06-02T15:26:59Z | |
| dc.date.created | 2015-05 | |
| dc.date.issued | 2015-04-03 | |
| dc.date.submitted | May 2015 | |
| dc.date.updated | 2017-06-02T15:14:49Z | |
| dc.description.abstract | INTRODUCTION: Excessive vocal effort perceived as strain may involve increased vocal fold compression. Electroglottography (EGG) in principle could provide a measure of strain directly connected to oscillatory kinematics at the sound source. The utility of EGG has been limited by considerable inter- and intra-subject variability. OBJECTIVE: This work aims to (1) develop an algorithm to analyze EGG signal in continuous, dysphonic speech and (2) identify parameters that correlate with strain. METHODS: EGG signal from 8 normal speakers and 8 subjects with adductor spasmodic dysphonia (ADSD) reading two-sentence excerpts from the Rainbow Passage was processed by the new software developed in MATLAB. The contact quotient (CQ), pulse width at the 50% amplitude level (EGGW50), and various closing slope and opening slope measures were extracted from selected speech segments. Intra-subject and inter-subject comparisons were then made. RESULTS: None of the EGG parameters differed between normal and ADSD speakers. Within- subject comparison among ADSD speakers showed that the opening slope measure SO7525 distinguished between the strained and unstrained syllables. CONCLUSION: These results provide further insight into the utility and limitations of EGG. While EGG may have limited utility in inter-subject comparison, it may provide a useful objective measure of vocal strain in the same subject with variable degrees of strain or over time. | en |
| dc.format.mimetype | application/pdf | en |
| dc.identifier.oclc | 988778293 | |
| dc.identifier.uri | https://hdl.handle.net/2152.5/4120 | |
| dc.language.iso | en | en |
| dc.subject | Dysphonia | en |
| dc.subject | Electrodiagnosis | en |
| dc.subject | Signal Processing, Computer-Assisted | en |
| dc.subject | Speech Production Measurement | en |
| dc.subject | Speech-Language Pathology | en |
| dc.subject | Vocal Cords | en |
| dc.title | Quantifying the Perceptual Quality of Strain: An Electroglottographic Analysis of Continuous Dysphonic Speech | en |
| dc.type | Thesis | en |
| dc.type.material | text | en |
| thesis.degree.department | UT Southwestern Medical School | en |
| thesis.degree.discipline | Research | en |
| thesis.degree.grantor | UT Southwestern Medical Center | en |
| thesis.degree.level | Doctoral | en |
| thesis.degree.name | M.D. with Distinction | en |