Kinematic and Acoustic Changes to Vowels and Diphthongs in Bite Block Speech
| Autor: | Tanner Low, Christopher Dromey, Michelle Richins |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Linguistics and Language
medicine.medical_specialty Diphthong Context (language use) Audiology 01 natural sciences Speech Acoustics Language and Linguistics Young Adult 03 medical and health sciences Speech and Hearing 0302 clinical medicine Phonetics Tongue Vowel 0103 physical sciences medicine Humans Speech 010301 acoustics Mathematics Acoustics 030206 dentistry Biomechanical Phenomena Formant medicine.anatomical_structure Fixation (visual) Bite block |
| Zdroj: | Journal of Speech, Language, and Hearing Research. 64:1794-1801 |
| ISSN: | 1558-9102 1092-4388 |
| DOI: | 10.1044/2021_jslhr-20-00630 |
| Popis: | Purpose We examined the effect of bite block insertion (BBI) on lingual movements and formant frequencies in corner vowel and diphthong production in a sentence context. Method Twenty young adults produced the corner vowels (/u/, /ɑ/, /æ/, /i/) and the diphthong /ɑɪ/ in sentence contexts before and after BBI. An electromagnetic articulograph measured the movements of the tongue back, middle, and front. Results There were significant decreases in the acoustic vowel articulation index and vowel space area following BBI. The kinematic vowel articulation index decreased significantly for the back and middle of the tongue but not for the front. There were no significant acoustic changes post-BBI for the diphthong, other than a longer transition duration. Diphthong kinematic changes after BBI included smaller movements for the back and middle of the tongue, but not the front. Conclusions BBI led to a smaller acoustic working space for the corner vowels. The adjustments made by the front of the tongue were sufficient to compensate for the BBI perturbation in the diphthong, resulting in unchanged formant trajectories. The back and middle of the tongue were likely biomechanically restricted in their displacement by the fixation of the jaw, whereas the tongue front showed greater movement flexibility. |
| Databáze: | OpenAIRE |
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