食道発声の空気力学的検討

概要

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This aerodynamic study was performed to clarify the mechanisms of esophageal speech. We simultaneously measured the air flow, sub-neoglottic pressure, pitch and intensity of esophageal voices in 20 esophageal speakers. Sub-neoglottic pressure was measured with a miniature catheter pressure transducer through the nose. The data were obtained during both softer and louder speaking.<BR>Sub-neoglottic pressure varied from 11 to 103 cm H<SUB>2</SUB>O. These values were higher than those of subglottic pressure in the normal larynx during phonation. The relation of positive neoglottic resistance and sub-neoglottic pressure, and negative neoglottic resistance and the air flow rate in esophageal speech was similar to that in the normal larynx during phonation. The subneoglottic pressure and the neoglottic resistance of skillfull esophageal speakers were higher than those of unskillfull subjects.
耳鼻咽喉科臨床学会の論文