We've all been there. You're in an important business meeting or out on a hot date when, like a teenager with tourette's, your Android phone suddenly moans "droid" or chimes or makes some other embarrassing and unexpected noise. It seems like no matter how many individual applications' notifications set to silent, something will pop up and make noise, often at the most inappropriate times. Fortunately, there's an easy way to quiet all your notifications with one setting while still getting their notices on screen.
Navigate to the settings menu. You can get to the settings menu by tapping the gear icon in the notification drawer or by launching it from the apps menu.