In the top-right corner of the Hangouts window is a light-grey-on-white button of a gear (along with other similarly-colored buttons). The gear indicates settings, which in this case means webcam, microphone, and speaker settings. From there you can set up your microphone better.
In my experience (though I believe other people have differing experience in this regard), once you find this button, you can get Google Hangouts to properly use any audio equipment that your computer and OS can recognize and use.
In the top-right corner of the Hangouts window is a light-grey-on-white button of a gear (along with other similarly-colored buttons). The gear indicates settings, which in this case means webcam, microphone, and speaker settings. From there you can set up your microphone better.
In my experience (though I believe other people have differing experience in this regard), once you find this button, you can get Google Hangouts to properly use any audio equipment that your computer and OS can recognize and use.