The HRTF characterizes the scattering of sound waves on the human body, especially on pinnae, head and torso; hence, it presents high variability between individuals. Given the success of recent geometrical models for the head-torso contribution to the HRTF, this work is proposing a method for modeling the pinna contribution. The model has, as entering data, specific pinna dimensions and it is able to estimate the pinna-related transfer function (PRTF) with a mean of 65% of accuracy for the inter-subject PRTF variance. Since each spatial position must be modeled individually, here we present a detailed example of the method used for modeling one of them. We use HRTF and anthropometric data from the CIPIC Database.
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