Identifying a Comparison for Matching Rough Voice Quality PurposePerceptual estimates of voice quality obtained using rating scales are subject to contextual biases that influence how individuals assign numbers to estimate the magnitude of vocal quality. Because rating scales are commonly used in clinical settings, assessments of voice quality are also subject to the limitations of these scales. Instead, ... Article
Article  |   October 01, 2012
Identifying a Comparison for Matching Rough Voice Quality
 
Author Affiliations & Notes
  • Sona Patel
    University of Florida, Gainesville, FL
  • Rahul Shrivastav
    University of Florida, Gainesville, FL
  • David A. Eddins
    Global Center for Hearing and Speech Research, University of South Florida, Tampa, FL
  • Correspondence to Sona Patel: sona.patel@northwestern.edu
  • Editor: Anne Smith
    Editor: Anne Smith×
  • Associate Editor: Melanie Matthies
    Associate Editor: Melanie Matthies×
Article Information
Speech, Voice & Prosodic Disorders / Voice Disorders / Special Populations / Genetic & Congenital Disorders / Speech, Voice & Prosody / Speech
Article   |   October 01, 2012
Identifying a Comparison for Matching Rough Voice Quality
Journal of Speech, Language, and Hearing Research, October 2012, Vol. 55, 1407-1422. doi:10.1044/1092-4388(2012/11-0160)
History: Received June 24, 2011 , Revised November 30, 2011 , Accepted February 3, 2012
 
Journal of Speech, Language, and Hearing Research, October 2012, Vol. 55, 1407-1422. doi:10.1044/1092-4388(2012/11-0160)
History: Received June 24, 2011; Revised November 30, 2011; Accepted February 3, 2012
Web of Science® Times Cited: 3

PurposePerceptual estimates of voice quality obtained using rating scales are subject to contextual biases that influence how individuals assign numbers to estimate the magnitude of vocal quality. Because rating scales are commonly used in clinical settings, assessments of voice quality are also subject to the limitations of these scales. Instead, a matching task can be used to obtain objective measures of voice quality, thereby facilitating model development and tools for clinical use.

MethodTwenty-seven individuals participated in a rating task or at least 1 of 3 matching tests (named after their modulation functions: SINE, SQUARE, POWER) to quantify the degree of roughness in dysphonic voice stimuli. Participants evaluated the roughness of 34 voice samples using an amplitude-modulated complex carrier.

ResultsThe matching thresholds were highly correlated with the ratings estimates. Reliability of thresholds did not significantly differ across tasks, but linear regressions showed that the POWER test resulted in larger perceptual distances.

ConclusionsA matching task can be used to obtain reliable estimates of roughness in dysphonic voices. The POWER comparison is recommended because the variability in matching thresholds across the range of roughness was evenly distributed, and the perceptual distances between stimuli were maximized.

Acknowledgments
This research was supported by Grant NIH R01 DC009029 from the National Institute on Deafness and Other Communication Disorders. We would like to thank Stacie Cummings for her help with data collection and Judith Wingate for lending her ears.
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