On a Lenovo G50 I have access to there was no sound being recorded by the internal microphone. This was a problem with Skype and Hangouts. The following fixed the issue:
- sudo apt-get install pavucontrol
- Type pavucontrol in the terminal
- A new window will open. Click on the Input Devices tab at the top of the window
- With Port set to Internal Microphone:
- Move the Front Left slider bar to more than 85% and the Front Right slider bar to between 60% and 70%
- Start your Skype conversation and keep tweeking the sliders in pavucontrol
Based on a post here: http://ubuntuforums.org/showthread.php?t=2270010
AJG-Develop 
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