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Effect of Experimental Palatal Prosthesis on Voice Onset Time
Mariko Hattori1, Yuka I Sumita2, Mahmoud E Elbashti2
1Clinic for Maxillofacial Prosthetics, University Hospital, Faculty of Dentistry Tokyo Medical and Dental University (TMDU), Bunkyo, Japan.
Summary
Wearing a palatal prosthesis significantly alters consonant production, specifically prolonging voice onset time for /ta/ and /ka/ sounds. This phonetic change was measurable using voice onset time analysis.
Area of Science:
- Speech Science
- Prosthetic Dentistry
- Phonetics
Background:
- Objective speech evaluation is crucial in prosthetic dentistry.
- Dental prostheses can impact speech intelligibility.
- Voice onset time (VOT) is a key phonetic measure for consonant production.
Purpose of the Study:
- To investigate the effect of a palatal prosthesis on consonant production.
- To measure changes in voice onset time (VOT) with and without a palatal prosthesis.
- To determine if palatal prostheses influence specific consonant sounds.
Main Methods:
- VOT was measured in 10 healthy women under two conditions: with and without a palatal prosthesis.
- VOT for /ta/, /ka/, and control /pa/ syllables were analyzed.
- The study tested the hypothesis that VOT for /ta/ and /ka/ would not change with prosthesis use.
Main Results:
- VOT for /ta/ and /ka/ syllables increased when wearing the palatal prosthesis.
- VOT for the control /pa/ syllable showed no significant change.
- The experimental palatal prosthesis demonstrably affected consonant sound production.
Conclusions:
- Palatal prostheses influence consonant articulation.
- Voice onset time measurement effectively detects speech changes caused by palatal prostheses.
- Findings highlight the importance of considering speech adaptation in prosthetic dental care.
