To turn back off the Google voice search feature in Google Chrome...

...you must uninstall and reinstall Chrome. At this thread there is a lot of gripes about how there in an opt in for the voice search and not an opt out. I found a way out. :P To opt in to begin with you must pull up Google in Google Chrome (it only works in the Chrome Browser) and then click on the microphone icon which will appear at the very right of the search box (only in Chrome).