Multitaper Spectrum Analysis of Consonants Produced by Patients With Dentofacial Disharmonies.

Saved in:

Bibliographic Details
Title:	Multitaper Spectrum Analysis of Consonants Produced by Patients With Dentofacial Disharmonies.
Authors:	Tran, Auvi¹, Oakley, Madeleine², Paye, Ciana³, Trudan, Emma⁴, Ghaltakhchyan, Nare¹, Turvey, Timothy¹, Blakey, George¹, Zajac, David¹, Mielke, Jeff² jimielke@ncsu.edu, Jacox, Laura Anne¹
Source:	Journal of Speech, Language & Hearing Research. Feb2024, Vol. 67 Issue 2, p455-476. 22p.
Subject Terms:	Language & languages, Comparative grammar, Comparative studies, Longitudinal method, Diagnosis of facial abnormalities, Speech disorder diagnosis, Regression analysis, Random forest algorithms, Maxilla, Malocclusion, Severity of illness index, Phonetics, Cephalometry, Descriptive statistics, Research funding, Spectrum analysis, Speech
Geographic Terms:	United States
Abstract:	Purpose: This study investigates differences in American English consonants produced by patients who present with various dentofacial disharmonies (DFDs), including severe overbites (Class II), underbites (Class III), and anterior open bites. Previous studies have found that patients with these malocclusion types all produce lingual sibilants and plosives with increased spectral center of gravity and increased spectral variance relative to controls. This result is puzzling since some DFD groups differ from controls in opposite ways, and it is also difficult to interpret because spectral moment measures are affected by a wide range of speech and nonspeech factors. Method: To better understand the articulatory basis of these differences, we apply articulatorily interpretable spectral measures derived from multitaper spectra. Results: We find that all groups of DFD patients produce /s ʃ t tʃ/ with midfrequency spectral peaks that are less prominent than those of the control group, but peak frequency measures are largely the same across all groups. Conclusion: We conclude that the DFD patients differ more in sibilant noise source properties than in front cavity filter properties. [ABSTRACT FROM AUTHOR]
	Copyright of Journal of Speech, Language & Hearing Research is the property of American Speech-Language-Hearing Association and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database:	Education Research Complete

Description
Abstract:	Purpose: This study investigates differences in American English consonants produced by patients who present with various dentofacial disharmonies (DFDs), including severe overbites (Class II), underbites (Class III), and anterior open bites. Previous studies have found that patients with these malocclusion types all produce lingual sibilants and plosives with increased spectral center of gravity and increased spectral variance relative to controls. This result is puzzling since some DFD groups differ from controls in opposite ways, and it is also difficult to interpret because spectral moment measures are affected by a wide range of speech and nonspeech factors. Method: To better understand the articulatory basis of these differences, we apply articulatorily interpretable spectral measures derived from multitaper spectra. Results: We find that all groups of DFD patients produce /s ʃ t tʃ/ with midfrequency spectral peaks that are less prominent than those of the control group, but peak frequency measures are largely the same across all groups. Conclusion: We conclude that the DFD patients differ more in sibilant noise source properties than in front cavity filter properties. [ABSTRACT FROM AUTHOR]
ISSN:	10924388
DOI:	10.1044/2023_JSLHR-23-00280