From the press release:
Herman Miller Inc. wants to make it easier for private telephone conversations to remain private. A device called Babble is the office furniture company's first foray into high-tech electronics. The wireless box duplicates and disassembles a user's voice before broadcasting it through a series of speakers to make phone conversations unintelligible to passers-by.
"It essentially turns one person's voice into something that sounds like a small-group conversation,'' said Bill DeKruif, president of Sonare Technologies, Herman Miller's research and design arm in Chicago."
"Anyone standing just a few feet away can hear the person talking but is unable to discern the content of the conversation because it's being muddled by the other voices," he told The Holland Sentinel for a Friday story.

(Via Gizmodo.)