Cabbage Patch
The Media scene in V is for Vendetta is the clue
ZNation already covered that in the first season episode where they found out where the loud thumping noise was coming from at the refinery, and used the noise from a keychain chime to lure the zombies away while they got oil.Reminds me of this article I read where a dude asked his military friends what would they do in a Zombie Outbreak...They said the shyt would be contained relatively quickly because Zombies are slow, are attracted to noise, don't shoot back and don't have counter-measures:
Fear the Walking Dead: The Military Wouldn't Crumble, by Jonah Goldberg, National Review
All you need is a loud speaker and your enemy literally will walk into your line of fire without taking cover.