Mac OS X’s Speech preferences pane includes two groups of options:
Speech Recognition lets you enable and configure speech recognition features.
Text to Speech allows you to set the default system voice and enable and configure talking alerts and other spoken items.
In this section, I explain how to set up and use these features.
Speech recognition requires a sound input device, such as a built-in or external microphone or an iSight camera.
The speech recognition feature works best in a relatively quiet work environment.
In the Speech preferences pane, click the Speech Recognition button (Figure 97).
Figure 97. The Settings options for Speech Recognition in the Speech preferences pane. ...