A beam of light can be controlled in many ways-it can be aimed at one person in a crowd, spread to fill a room, or project to create distant, rich imagery. We can now do these very same things with sound!
Holosonics - Beamed Audio

Through a combination of careful mathematical analysis and engineering insight, the Audio Spotlight sound system has become the very first, and still the only, sound beam system which generates low-distortion, high quality sound in a reliable, professional package.
"... Audio Spotlights may be the most radical technological development in acoustics since the coil loudspeaker was invented in 1925... The audio spotlight will force people to rethink their relationship with sound, as the arrivals of the phonograph, the telephone and the Walkman have done before." - New York Times
Web Link: http://www.holosonics.com/
Holosonics - Beamed Audio - AudioSpotlight

The AudioSpotlight controls sound like a laser controls a beam of light, sound only goes where it is aimed! The technology projects sound that can shine, scatter and reflect similiar to light.
Powerful traditional speakers do not harness sound, they can only broadcast, hence all the problems with "sound spill" and noise pollution!
Allow for your message to be sent clearly and directly to your customer or visitor in a compelling format, in doors and out. In the middle of a crowd or in the silence of a gallery, without "spillage" and "sound pollution" and without interfering with others enjoyment.
Call EAV Technology to find out more about this exciting product.
Web Link: http://www.holosonics.com/