mmm@weitek.UUCP (Mark Thorson) (09/25/85)
The human nervous system is alleged to be sensitive to the audio modulation of a 20 KHz to 200 KHz electro-magnetic signal. It is claimed that this technique has been used to transmit speech and music to the deaf. You can order a copy of the patent on this technique from the US Patent Office, Crystal Springs VA. The cost used to be 50 or 75 cents, but I don't know what it is now. Ask for patent #3,393,279. The patent expired on July 16. Happy zapping :-) Mark Thorson (...!cae780!weitek!mmm) P.S. The patent includes a circuit diagram. Let me know if you want to build an updated version of one, cause I've been thinking about it too.