Key anthropometric parameters of pinna correlate with individualized head-related transfer functions

Anthropometry parameters based individualized head-related transfer functions (HRTFs) are essential to improve virtual auditory display performance. However, the interaction between anthropometric structure and sound wave is very complex, much is still unknown on how to measure and select proper anthropometry parameters. In the present work, a set of anthropometric parameters was measured on the 3D-scaned head model of SCUT and HKUST. The corresponding HRTFs were calculated using boundary element method. The correlation between anthropometric parameters and HRTF was analyzed to select the key parameters. Result indicates that the cavum concha depth have strong correlation with the HRTF spectrum. A review of literature indicates that the cavum concha depth has seldom been measured and used in previous studies on individualized HRTFs because the cavum concha depth is difficult to be measured accurately. With our proposed methods, the new set of anthropometric parameters including cavum concha depth will be used to improve the recovery or customization of the individualized HRTFs.