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Acoustic variations in adductor spasmodic dysphonia as a function of speech task
C M Sapienza1, S Walton, T Murry
1University of Florida, Department of Communication Sciences and Disorders, Gainesille 32611, USA. sapienza@csd.ufl.edu
Journal of Speech, Language, and Hearing Research : JSLHR
|February 20, 1999
Summary
Women with acquired oxidant-related vocal dysfunction (ADSD) exhibit more acoustic vocal events like breaks and shifts than healthy individuals. These vocal event patterns differ between sustained vowels and reading tasks in ADSD patients.
Area of Science:
- Speech and Hearing Sciences
- Acoustic Phonetics
- Vocal Pathology
Background:
- Acquired oxidant-related vocal dysfunction (ADSD) is a condition affecting voice quality.
- Understanding the acoustic characteristics of ADSD is crucial for diagnosis and treatment.
- Previous research has not fully detailed the specific acoustic phonatory events in ADSD.
Purpose of the Study:
- To compare acoustic phonatory events in women with ADSD versus age-matched controls.
- To analyze differences in acoustic events during sustained vowel production and reading tasks.
- To identify the types and frequency of aberrant acoustic events in ADSD.
Main Methods:
- Acoustic analysis of sustained vowels and reading passages.
- Identification and quantification of phonatory breaks, aperiodicity, and frequency shifts.
- Comparison of event frequency between 14 women with ADSD and 14 healthy controls.
Main Results:
- Women with ADSD produced significantly more aberrant acoustic events than controls.
- Acoustic event patterns varied between sustained vowel tasks and reading tasks in the ADSD group.
- Aperiodic segments and phonatory breaks were more common in sustained vowels, while frequency shifts predominated during reading for ADSD patients.
Conclusions:
- Acoustic analysis effectively differentiates vocal events in ADSD.
- Task-specific analysis of acoustic events provides valuable insights into ADSD characteristics.
- Further research into intertask performance variations in ADSD is warranted.