Important Information about Abstract
- Please submit abstract of no more than 350 words. To complete your abstract submission process, you must first write your abstract as a separate document/file using Microsoft Word document. Use Calibri size 12 font and use Word 97-2004 Document (.doc).
QUANTITATIVE ANALYSIS OF DIPLOPHONIC VOCAL FOLD VIBRATORY PATTERN
FROM HIGH-SPEED DIGITAL IMAGING OF GLOTTIS.
Yuling Yan1, Krzysztof Izdebski2, Diane Bless3
1: Santa Clara University, Santa Clara, CA, USA
2: Pacific Voice and Speech Foundation, San Francisco, CA, USA
3: University of Wisconsin-Madison, WI, USA
Purpose: Investigate vocal fold (VF) vibratory properties using quantitative analysis of High Speed Digital Imaging (HSDI) based on Nyquist-plot technology derived from voicing during production of aberrant voice quality (VQ), clinically referred to as diplophonia. Define the mechanism responsible for diplophonia and show how treatment (Tx) effects this VQ and VF behavior and resorts normative phonation.
Method: Pre- and post-Tx HSDI recordings of a female patient with muscular tension dysphonia (MTD) were analyzed using new quantitative analysis system for HSDI that involves tracing of VF edge and generation of glottal waveform and VF displacement, allowing to define quantitative measures of vibratory symmetry and synchronization of VF vibrations, with subsequent analyses of glottal waveforms using Nyquist formula, to reveal vibratory pattern and characteristics of the vocal folds during this aberrant sound production, and later during normative phonation post Tx.
Results: This is first ever HSDI and Nyquist- plot based analyses of aberrant voice known as diplophonia derived here from vocalization of a MTD case. The results showed definitive and specific character of VF vibration responsible for this VQ. HSDI showed specifically that the anterior and posterior aspects of the VF vibrate differently and these vibratory asynchronicities are responsible for the distinct vibratory patterns. During the diplophonic phase, the anterior and mid portion of the VF exhibited a bi-cyclic vibratory pattern, whereas vibration in the posterior portion of the vocal folds was more normal with an extended closed phase or a smaller open quotient (OQ). Conversely, vibrations within the left-right folds were almost symmetrical. Identical analytical formula was applied to analyze the post-Tx voice. The results showed an improved synchronization of the VF vibration pattern and associated positive acoustic changes in post treatment VQ.
Key Words: High-speed digital imaging, vocal-fold vibration, diplophonia, symmetry, GAW, Nyqist plots, MTD, voice quality.
- When ready, click on SUBMIT ABSTRACT (see bottom of this page) and follow prompts as needed.
- Attach your abstract file document to the window "Choose File" and then click next.
- Now choose Presentation Preference.
- When you click "finish" next, your abstract will be submitted automatically.
- You will be notified automatically that your abstract was received.
- Poster presentations will be displayed during conference. The vertical-by-horizontal poster space for each presenter will allow for posters up to 45 x 91 inches (114 x 231 cm).
Students may also apply for Student Poster PVSF Award in the amount of $500.
If awarded to a non SCU student, the conference registration fee will be also waived and the winner will be hosted by PVSF at no charge at the Gala Dinner.
Both US and International students will be considered. Post-doctoral fellows are not considered students eligible for this award. In addition to the on-line abstract submission, students applying for this PVSF award will need to provide the following via email to firstname.lastname@example.org.
- Summary of student’s background, current work and future plans in 500 words or less
- Name and address (email included) of student’s advisor.