Validating Spectral Moment Analysis as a Quantitative Measure of Speech Distortions in Speakers With Class III Malocclusions.

ABSTRACT:

Purpose

This study examined the relationship between judged speech sound distortions and spectral moment metrics in speakers with Class III malocclusion.

Methods

A quantitative online survey was distributed to 30 speech specialists (clinicians and/or students) and 100 lay listeners to judge the clarity of the sounds /s/, /ʃ/, /t/ and /k/ using a visual analog scale (VAS) from recordings of 11 Class III (underbite) Dentofacial Disharmony (DFD) patients and eight Class I controls. Patients and controls were grouped according to high, moderate, and low /s/-/ʃ/ first spectral moment differences. A linear mixed model was used to analyze the data.

Results

VAS scale ratings increased as a function of decreasing spectral contrast for both groups of listeners. VAS ratings of s

SUBMITTER: Jhingree S 

PROVIDER: S-EPMC9302712 | biostudies-literature | 2022 Jun

REPOSITORIES: biostudies-literature