This is so smart Amtrack uses similar techniques installing PA systems on its trains. Hacked-off communications, lots of crackling, and basically loudish inconsistent noise streams actually save a considerable amount of energy ensuring higher probabilities passengers reach their destinations unscathed.

In the future, the plan is to employ an audible morse code telegraph PA system along with passenger cheat sheets until they all get it. Amtrack contracted out some communications company called Satan's Communications for a Better Tomorrow, LLC.