Patent ID: 8493574

Claim:
A method comprising: inserting an inflatable membrane into an ear canal of a subject; pressurizing the inflatable membrane within the ear canal with a fluid to a predetermined pressure, thereby providing an inflated membrane; obtaining a first three-dimensional image of a surface of the inflated membrane at the predetermined pressure; causing a muscoluskeletal movement of a head of the subject; obtaining a plurality of three-dimensional images in a three-dimensional video from a series of time-separated measurements during the musculoskeletal movement, the plurality of three-dimensional images including a second three-dimensional image of the surface after the muscoluskeletal movement; identifying a change in shape of the surface between the first three-dimensional image and the second three-dimensional image, the change in shape including a plurality of intermediate shapes during the musculoskeletal movement; and storing the change in shape as ear canal shape change data for the subject.