Subliminal Messages stories  Back in the day a shopkeeper might
hire a barker to loudly tease the goods found inside a store.
That changed with technology, with loudspeakers urging you to
stop and look in. With today's technology, the practice of
capturing a customer's attention is subtler — so much so a
person isn't necessarily distracted by the sound or even realize
if they are prompted to move inside by it.