传统的发音重建有人工喉和食管发音。人二：喉发音不自然，州外繁＊。；食管发音不易掌握且声音小，语音低。发音钮是声音重建较新的方法，具有语言流畅易懂，容易掌握等优点。但一般发音或均存在两个弱点，气流通过发音钮及食道人口段的高阻力及使用寿命短。文所采用的Provo。 Traditional pronunciation reconstructs artificial throat and esophageal sounds. Two people: larynx pronunciation is not natural, the state outside the complex *. ; Esophageal pronunciation is not easy to grasp and voice is small, voice is low. Sound button is a relatively new method of sound reconstruction, with a smooth and easy to understand language, easy to grasp and so on. However, there are two general weaknesses or pronunciation, air flow through the button and the esophagus population section of the high resistance and short service life. Provo used by the text.