A SoCal company is developing technology that can deliver highly focused beams of sound at shoppers, browsers and passers-by, enticing them to look at displays, sample products and maybe even eat McDonald’s. As the WSJ tells us:

… Donna Now was caught off-guard by a subtle voice above the corned beef. Glancing up, she saw a plasma screen bursting with color and seeming to address only her. The voice pitched a special on Sara Lee honey turkeys and brown-sugar hams.

“It’s pretty powerful,” Ms. Now said. “I mean, I’m a vegetarian, but this makes you want to buy that ham.”

… In tests at retail stores, these laserlike sound beams pinpoint individual shoppers to encourage buying with recorded messages. At some Wal-Marts that have in-store McDonald’s, for example, shoppers heard messages extolling the fast-food outlet’s offerings.

The technology’s been hyped for a while and is a Popular Science award-winner. It’s now beginning to be rolled out in retail applications. Check out how Borealis Breads has been using it.

Here’s a more technical explanation from Appliance Manufacturer magazine.