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Voice Onset Time in Patients Using Speech Prosthesis After Total Laryngectomy
Elad Azizli1, Zeynep Alkan2, Ismail Koçak3
1Private Akif Mehmetoğlu Outpatient Clinic, Istanbul, Turkey.
Journal of Voice : Official Journal of the Voice Foundation
|October 9, 2020
Summary
Patients with total laryngectomy using tracheoesophageal speech prostheses showed no significant difference in voice onset time (VOT) for /pa/ and /ta/ sounds compared to controls. However, /ka/ sound VOT was significantly lower in the patient group.
Area of Science:
- Otorhinolaryngology
- Speech-Language Pathology
- Acoustic Analysis
Background:
- Total laryngectomy significantly alters voice and articulation.
- Tracheoesophageal speech prosthesis (TSP) is a common method for voice restoration.
- Voice onset time (VOT) is a critical acoustic parameter for assessing articulation.
Purpose of the Study:
- To investigate voice and articulation differences in patients with TSP after total laryngectomy.
- To compare voice onset time (VOT) values between laryngectomized patients and healthy controls.
Main Methods:
- Included 18 patients with total laryngectomy and TSP, and 20 healthy male controls.
- All subjects produced /pa/, /ta/, /ka/ syllables.
- Voice onset time (VOT) values were measured using computer recordings.
Main Results:
- No statistically significant age difference between the groups.
- VOT for the /ka/ syllable was significantly lower in the TSP group compared to controls.
- VOT for /pa/ and /ta/ syllables showed no significant difference between groups.
Conclusions:
- Articulation of voiceless plosives, except for /ka/, is similar between laryngectomized patients with TSP and controls.
- Further research with larger cohorts and diverse acoustic indicators is recommended for clinical standardization.
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