The Mind of an Inventor
kipb writes to tell us that Newsweek has an interesting article about Danny Hillis and the company he co-founded called Applied Minds. One of the featured devices that Hillis talks about is a device designed to increase the amount of privacy one has working in the average corporate cubicle. "Babble" is about the size of a paperback book and plugs into the phone with two external speakers that you place on the top of your cube. While holding a normal conversation on the phone Babble plays back random meaningless snipits of your own voice which makes your conversation practically unintelligible to people as close as 4 feet away.
In Kissinger's memoirs, White House Years, he describes how he and others, probably Nixon included, while in Moscow for a summit meeting, brought along a device I believe he called "the babbler", which was a tape player that played the sounds of many people speaking or maybe splices of babble. Then they could converse in their presumably bugged living quarters while playing the babbler. Kissinger wrote that it became intolerable after a while, it was so distracting.