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Updated: Jul 4, 2025
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fMRI Mapping of Brain Activity Associated with the Vocal Production of Consonant and Dissonant Intervals
Published on: May 23, 2017
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Multitaper Spectrum Analysis of Consonants Produced by Patients With Dentofacial Disharmonies
Auvi Tran1, Madeleine Oakley2, Ciana Paye3
1Adams School of Dentistry, University of North Carolina at Chapel Hill.
Journal of Speech, Language, and Hearing Research : JSLHR
|January 31, 2024
Summary
Patients with dentofacial disharmonies (DFDs) alter consonant sounds, specifically sibilants and plosives. This study reveals differences in noise source properties, not front cavity filters, in DFD patients’ speech.
Area of Science:
- Speech Science
- Acoustic Phonetics
- Orthodontics
Background:
- Dentofacial disharmonies (DFDs) like overbites and underbites can affect speech production.
- Previous research noted altered spectral properties in DFD patients' speech, but findings were inconsistent and difficult to interpret.
Purpose of the Study:
- To investigate the articulatory basis of speech sound differences in patients with DFDs.
- To apply novel spectral measures for a clearer understanding of consonant production variations.
Main Methods:
- Utilized multitaper spectral analysis to derive articulatorily interpretable spectral measures.
- Analyzed American English consonants (/s ʃ t tʃ/) produced by DFD patient groups and a control group.
Main Results:
- All DFD patient groups exhibited less prominent mid-frequency spectral peaks for /s ʃ t tʃ/ compared to controls.
- Peak frequency measures remained consistent across all DFD groups and the control group.
Conclusions:
- DFD patients' speech differences are primarily related to sibilant noise source properties.
- Front cavity filter properties do not appear to be the main differentiating factor in the speech of these DFD patients.
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