3D Head Anthropometry for Head-Related Transfer Function of Chinese Pilots

The 3D head anthropometry of 69 Chinese male pilots was tested in order to build China Air Force head-related transfer function (HRTF) database, i.e. CHNAF HRTF Database in abbreviation. There were totally 93 anthropometric landmarks defined according to principles of physical acoustic reflection and refraction. All the landmarks were measured in sitting with (x, y, z) coordinate system to get 2D dimensions in GB/T 5703/ISO 7250-1 and GJB 4856 and 3D descriptions of the head with polar coordinate transformation in (r, ϕ, θ). The test results of the 3D descriptors showed the 3D positions of anatomical mediators between the outer acoustic signal and pilots’ auditory spatial localization, in which there were 50 landmarks about ears or auricle, 33 landmarks about skull, eyes, face and noses and 10 about neck and shoulders. Therefore, the CHNAF HRTF Database could provide about 150 items of anthropometric measurements for HRTF and its personalization especially with focus on the role of ears.