Both apple and android (modern versions) have methods to allow most noise to be blocked, but "emergencies" to get through. http://www.macobserver.com/tmo/artic

Both apple and android (modern versions) have methods to allow most noise to be blocked, but "emergencies" to get through. http://www.macobserver.com/tmo/article/how-to-set-and-use-do-not-disturb-in-ios-6 http://www.macobserver.com/tmo/article/how-to-set-and-use-do... I don't know the specific android thing, but do know people who use it.