Facebook has unveiled a new feature that lets people share what theyre watching or listening to without having to type or speak a single word. On Wednesday, May 21, the site announced a new opt-in audio recognition system that will be incorporated into its mobile app in the coming weeks. The function uses a persons smartphone microphone to listen for what songs, TV shows or movies the user is currently hearing. The feature will listen for familiar audio — kind of like Shazam — and then give users the option to share what it finds as a status update. The