He sure pulled the ol' empty suit out of the fire there.
Check the Volume settings to see if the microphone volume is all the way down. You can access it in the control panel or the little icon of a speaker in your system tray (the place where the clock is). If everything is all connected and enabled, maybe you should sit closer to the mic or get a new one.
What would I do if confronted by a life or death situation? If that issue make you issue you then must have a look here