Not exactly what you want but I think is good for the ideea: "Several hi-tech companies including HP in the US and Nokia in Finland, are working on a "skin conductance network" which will allow people to exchange electronic messages, for example, a greeting card or document, by shaking hands. The actual document is stored on the mobile phone and is transmitted via electrodes from body to body. I am researching this story now and will be writing more about it later. NASA is also interested in this techniques...consider the constraints of present-day telemedicine in space...so bionic headphones are only part of the story! Invention: Body-wired headphones > > 15:40 27 November 2006 > > NewScientist.com news service > > Barry Fox > > Body-wired headphones > > Sony's Tokyo research lab has found a way to connect headphones to port= able music and video players without the need for fiddly wiring. They simply feed an audio signal straight through the listener's body. Existing wireless headphones use Bluetooth radio, but this means pairing two devices beforehand and is prone to interference from other equipment. Another approach =96 infra-red =96 relies on line-of-sight, which is rarely practical. The new system uses the listener's body as a capacitor that carries a tiny electrostatic charge. A music or video player sends a fluctuating signal to a conductive cloth pad =96 such as a wrist band =96 and this slightly charges the wearer's body. A pair of conductive ear pads in the headphones pick-up the signal and rapidly convert it back into sound. Just a few millionths of an amp flow through the wearer's body, so there should be no nasty tingling effect. To convert the small charge into good quality audio, Sony uses a high frequency signal, which is digitally switched to carry data at 48 kilobytes per second. This is enough to deliver good quality, body-rocking stereo, the company says. Read the full body-wired headphones patent application at uspto: United States Patent Application 20060252371 Kind Code A1 Yanagida; Toshiharu November 9, 2006 > > Human body communication system and communication device > > Abstract: Disclosed herein is a human body communication system for communicating data via an electric field formed by intervention of a human body, the human body communication system including: a transmitter for generating the electric field by transmitting a potential difference signal corresponding to transmission data from a transmitting electrode; and a receiver for receiving the data by reading the potential difference signal in the electric field by a receiving electrode; wherein the transmitter and the receiver use the potential difference signal in a frequency band such that a quasi-electrostatic field formed within the human body is dominant over a radiation field formed outside the human body when the transmitting electrode and the receiving electrode are each disposed in very close vicinity to the human body. Claim: 1. A human body communication system for communicating data via an electric field formed by intervention of a human body, said human body communication system comprising: a transmitter for generating said electric field by transmitting a potential difference signal corresponding to transmission data from a transmitting electrode; and a receiver for receiving the data by reading the potential difference signal in said electric field by a receiving electrode; wherein said transmitter and said receiver use the potential difference signal in a frequency band such that a quasi- electrostatic field formed within the human body is dominant over a radiation field formed outside the human body when said transmitting electrode and said receiving electrode are each disposed in very close vicinity to the human body. On 12/23/06, James Newtons Massmind wrote: > So... Here's a fun one for the RF people over the holiday. > > We need to xmit data from a logger INSIDE a body over a range of a few fe= et. > > And it has to be micro power. > > And it has to be faster than 56Kb. > > Has anyone done it? > > Has anyone tested the fall off of RF from inside a body as frequency > increases? > > Has anyone any idea how you go about figuring out what frequency to use? > > Has anyone any idea how to setup a test to see find out how the signal fa= lls > off as the frequency increases? > > --- > James. > > > -- > http://www.piclist.com PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist > -- = http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist