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Voicing distinction in esophageal speech
1Department of Speech Pathology, Kitasato University School of Allied Health Sciences, Kanagawa, Japan.
Acta Oto-Laryngologica. Supplementum
|January 1, 1996
Summary
Skilled esophageal speakers effectively distinguish voiced and voiceless consonants using voice onset time and neoglottal adjustments. Their articulatory techniques enable clear consonant production, minimizing confusion in esophageal speech.
Area of Science:
- Speech-Language Pathology
- Acoustic Phonetics
- Physiology
Background:
- Esophageal speech relies on alternative methods for voicing.
- Understanding consonant production is crucial for improving speech intelligibility.
Purpose of the Study:
- To analyze the articulatory ability of skilled esophageal speakers in consonant voicing.
- To identify acoustic and physiological cues for voicing distinction in esophageal speech.
Main Methods:
- Perceptual, acoustical, and physiological (fiber-optic, photoglottography, EMG) analyses were performed.
- Voice onset time (VOT) and intraoral pressure were measured.
- Neoglottal function and neck muscle activity were examined.
Main Results:
- Voiced-voiceless consonant confusion was low (10.5%).
- Voice onset time (VOT) and voicing presence/absence were key acoustic cues.
- Transient neoglottal opening for voiceless sounds and closure for voiced sounds were observed.
- Higher intraoral pressure for voiceless stops was noted in esophageal speakers.
Conclusions:
- Skilled esophageal speakers demonstrate proficient voicing distinction.
- Acoustic cues (VOT) and physiological mechanisms (neoglottal function) are vital for this ability.
- Articulatory strategies contribute to clear consonant production in esophageal speech.