Anthropometry of external auditory canal by non-contactable measurement
We use the non-invasive computed tomography technology to measure the geometric shape of external auditory canal. The length and width of ear canal openings for men are longer, wider than those for women. The difference between the length and width of the ear canal opening is about 40%. The circular cross-section shape of the earplugs should be replaced with elliptical cross-section shape for better fitting.
anthropometry external auditory canal computed tomography