Patent ID: 8874185

Claim:
A method of determining the electrical potential of a first location (A) on skin of an animal or human being relative to a reference location (R) on the skin of an animal or human being, the method comprising the steps of: attaching, to each of the first location (A) and the reference location (R) an electrode, each electrode having at least three sensors arranged so that lines through centers of respective pairs of sensors define two linearly independent directions, and where the electrode attached at the first location and the electrode attached at the reference location are oriented such that the two linearly independent directions defined by the electrode at the first location (A) are substantially the same as the two linearly independent directions of the electrode at the reference location (R), each electrode being connected to a wireless transmitter that is adapted to receive sensed electrical potential and to transmit signals representing the sensed electrical potentials; sensing, with each of the sensors on each electrode: an electrical potential on the skin; transmitting, using each respective wireless transmitter, signals representing at least two differences between pairs of potentials sensed with corresponding pairs of sensors on each electrode; receiving, using a wireless receiver, the transmitted signals; and determining the electrical potential at the first location (A) relative to the reference location (R) based on the received signals.