Synthetic Telepathy - The Hidden Truth (tags)
The following article is an entry that appeared on Wikipedia. Within the last 24 hours a major "edit war" broke out and it appeared, at least to me, that the information was being suppressed. The article goes into depth about a field of espionage that employs a technology known as "silent sound" or "Synthetic telepathy". If you're interested in high tech espionage, this makes for a very good read.
by N.I. Anisimov, 1999