Artificial larynx

Japanese: 人工喉頭 - じんこうこうとう(英語表記)artificial larynx
Artificial larynx
An instrument used to produce speech after laryngectomy. When a patient has undergone surgery to remove the larynx due to laryngeal cancer, it is desirable to be able to produce speech through esophageal speech, but approximately 30-40% of patients are unable to do so. In such cases, as a second-best option, some kind of instrument is used to produce speech. Patients without a larynx usually have a hole in the trachea, and exhaled air from the lungs is guided through this hole to a whistle via a connecting tube, which vibrates a rubber band acting as a substitute vocal cord, and the sound is guided into the mouth to produce speech.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:
喉頭摘出手術後の発声に用いる器具。喉頭癌などで喉頭を摘出する手術を受けた場合,食道発声により声を出せるようになるのが望ましいが,3~4割程度の患者ではうまく習得できないことがある。この場合,次善の策として,なんらかの器具を用いて声を出すくふうが行われている。無喉頭者ではふつう気管に穴があいているので,この穴より肺からの呼気を連結管を介して笛部に導き,代用声帯としてのゴム帯を振動させ,この音を口腔内に導いて言葉を発するようにさせる。

出典 株式会社平凡社世界大百科事典 第2版について 情報

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