Burger King uses sound to take a jab at their longtime rival.
Burger King is using voice and audio to trigger a unique in-person experience.
“Burger King has installed voice recognition software in the restrooms of select restaurants in Sweden and Denmark.
If it detects the phrase "cancelled clown" has been repeated three times, it dims the lights and causes a vision of McDonald's mascot Ronald McDonald to appear in the mirror.
The Halloween campaign, which pulls on the popular "Bloody Mary" urban legend, is just one of many where Burger King has featured its fast-food rival."