# Subscribe to voice enhancement mode change events in Amazon Connect Agent Workspace
<a name="3P-apps-voice-requests-onvoiceenhancementmodechanged"></a>

Subscribes a callback function whenever voice enhancements mode is changed in user's profile.

 **Signature** 

```
onVoiceEnhancementModeChanged(handler: VoiceEnhancementModeChangedHandler)
```

 **Usage** 

```
const handler: VoiceEnhancementModeChangedHandler = async (data: VoiceEnhancementModeChanged) => {
  console.log("User VoiceEnhancementMode changed! " + data);
}

voiceClient.onVoiceEnhancementModeChanged(handler);

// VoiceEnhancementModeChanged structure
{
  voiceEnhancementMode: string
  previous: {
     voiceEnhancementMode: string
  } 
}
```

 **Permissions required:** 

```
*
```