Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.3 alpha 4/15/85; site weitek.UUCP Path: utzoo!linus!philabs!prls!amdimage!amdcad!cae780!weitek!mmm From: mmm@weitek.UUCP (Mark Thorson) Newsgroups: net.physics Subject: Human perception of EM waves. Message-ID: <278@weitek.UUCP> Date: Tue, 24-Sep-85 18:24:53 EDT Article-I.D.: weitek.278 Posted: Tue Sep 24 18:24:53 1985 Date-Received: Fri, 27-Sep-85 07:20:07 EDT Organization: Weitek Corp. Sunnyvale Ca. Lines: 13 Keywords: nervous system excitation device 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.