I would rather read news on web sites than listen to TV news channels. But that is probably not the average case.

There are standard pictographs for "fire exit" and "do not open door" that are used where not everyone reads the same language.

You know those long treadmills at airports that you walk on to move faster through the concourse? They have speakers at either end constantly repeating a warning that the end is coming and to watch your step.