The different types are shown in Figure 2.

　

Figure 2　Comparison of types of speech

1.　Normal speech

2.　Esophageal speech

3.　Artificial larynx

4.　Electrolarynx

5.　Shunt speech

　

Explanation of figures

　

1.　Normal speech: Air from the lungs passes through the vocal cords, causing them to vibrate and produce vocal sounds.

2.　Esophageal speech: In haling and holding air in the esophagus, then expelling it to produce sound at the esophageal mouth.

3.　Artificial larynx with a pipe: Air from the lungs is piped through a tube to produce sound.

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