Patent ID: 7251025

Claim:
A method for generating a 3D data model of an inside surface of a person's ear canal comprising the steps of: inserting a probe into the ear canal: determining a distance from a distal portion of the probe to at least one point of an internal circumferential surface of the ear and/or ear canal, obtaining data concerning the position and rotation of the distal portion of the probe relative to the person's head during movement of the probe from a first to a second location using first transducing means associated with the distal portion of the probe and second transducing means arranged in a fixed construction held immobilized relative to the person's head, where the first transducing means transmits a magnetic field, and the second transducing means detects the magnetic field generated by the first transducing means, and recording corresponding values of said distances from a distal portion of the probe to points of an internal circumferential surface and the position of the probe.