1. A method for creating a representation of a three-dimensional contour of an ear canal comprising: imaging said ear canal using an optical coherence tomography imaging sensor at a plurality of positions in said ear canal to create a plurality of cross section images; recording the position of said sensor at each position in said plurality of positions; identifying a boundary of each cross section in said plurality of cross sections; and combining said plurality of cross section images as a function of said identified boundaries and said recorded positions to create a three dimensional representation of at least a portion of said ear canal.