Google promised for hands-free voice search in Chrome earlier and now today, Google has released new Chrome voice extension ‘OK Google’ for desktop Chrome users. “OK Google” voice search feature will work on any computer running the Chrome Browser with a microphone.
You can install Chrome voice extension from the Chrome browser Web Store. This extension allows you to say “Ok Google” and start speaking your search. Be clear with your “OK Google” phrase, this extension sends your question to Google only when it hears the phrase “Ok Google.”
After installing extension, it will ask for permission to use your microphone from there on. After this you will be ready for your first voice search on Google using Chrome browser. The service is in it’s beta version. Check out the video below for step-by-step process to use “OK Google” voice search”[Via] [Source]