Developing high-fidelity digital twins of head and torso simulators (HATS) provides us with reliable simulations that could replace tedious measurements and facilitate the rapid and efficient design of AR/VR products. In this paper, we aim to develop and validate a digital twin of the Brüel and Kjær high-frequency HATS Type 5128. The digital twin uses an accurate scan of the HATS and captures the behavior of the ear simulator (Type 4620), including the full average human ear canal geometry and a termination coupler emulating an average eardrum impedance response. As a natural first step, finite-element acoustic simulations in COMSOL are set up to validate the far-field head-related transfer function (HRTF) with measurements for three spatial directions in the horizontal plane. To increase the confidence in the validation results, a rough convergence study is conducted for the simulations, and measurements are compared against the manufacturer’s reference measurements. Finally, we show how validation studies may be improved by investigating some of the commonly-used modeling assumptions.
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