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Optimization and Prediction of the Spherical and Ellipsoidal ITD Model Parameters Using Offset Ears

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In the absence of measurements, geometric head models offer a simple way to predict the ITD from a small number of parameters that can ideally be related to morphological quantities. This paper compares the ITD predictions of the spherical and ellipsoidal head models with offset ears to the measured ITD of thirty seven subjects. The model parameters are ?rst individually optimized and then regression analysis is conducted to predict these parameters from anthropometric measurements. Lower global errors are obtained when the interaural axis is no longer constrained to intersect the center of the sphere or ellipsoid. The global error metrics of both models are very similar but differ in their spatial distributions.

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AES - Audio Engineering Society