voice_age
                                                    Specifies the Voice model name, which indicates the type of TTS technology used for synthesis.
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                                                                     Value  | 
                                                                
                                                                    
 DEFAULT: Adult  | 
                                                            
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                                                                     How to set  | 
                                                                
                                                                     
                                                                         Set in the session xml file for the application. Configure the <speechsynth> element located under <sessionparameters>, <speechserver>. Set in a VoiceXML application, using the age attribute of a <voice> element. Set in the voice browser, using the Voice-Age header in a SPEAK method. 
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                                                                     Usage  | 
                                                                
                                                                     Seldom used.  |