The New York Times > Technology > No Privacy in Your Cubicle? Try an Electronic Silencer "Maxwell Smart's "cone of silence" is finally a reality.
Two people in an office here were having a tête-à-tête, but it was impossible for a listener standing nearby to understand what they were saying. The conversation sounded like a waterfall of voices, both tantalizingly familiar and yet incomprehensible.
The cone of silence, called Babble, is actually a device composed of a sound processor and several speakers that multiply and scramble voices that come within its range. About the size of a clock radio, the first model is designed for a person using a phone, but other models will work in open office space."