To enable the Microphone: Scroll down to the Microphone section and select the radio button next to Ask when a site requires access to your microphone (recommended).*.In the Privacy section, click on the Content Settings.button.Scroll to the bottom of the window and select Show Advanced Settings.
To allow Google Hangouts and/or Google Talk to use the camera and/or microphone: To set the Sound Preference Pane to use the computer's internal microphone: The Sound Preference Pane in System Preferences may also need to be set to use the computer's internal microphone. If the camera or microphone are not working for Google Hangouts or Google Talk, those apps will need to be given permission to use those resources.
