Voices in your head
Posted at 12:39 PM on 12-10-07 by Rob T Firefly
The so-called “hypersonic sound beam” billboards are beginning to pop up around town. These billboards are equipped with ultrasonic emitters that focus a narrow beam of sound through the air on a highly directional carrier wave. When you walk past a particular spot at a particular time, the result is sound that only you can hear, which seems to come from inside your own head.
Naturally, it’s being used to make people hear strange voices in their heads whispering things like “Who’s there? Who’s there?” in order to market a paranormal-themed TV show.
An insightfully titled Gawker post asks, “How soon will it be until in addition to the do-not-call list, we’ll have a ‘do not beam commercial messages into my head’ list?”
Have you been hit with it yet?
Coverage:
Advertising Age
WFMU
PSFK
Gawker