An auditory process model for sound localization

An auditory process model for sound localization in the horizontal plane is presented in this paper. Based on equalization-cancellation (EC) theory, the binaural processor produces excitation-inhibition (EI) cell activity patterns at each frequency band, which are, then, combined by the central processor employing simple template-matching method. Gain and delay errors have been introduced at the end of the peripheral process in order to accommodate the imperfection possibly present in human EC process. These parameters have been adjusted to fit the model performance to that of human listeners described in a few published subjective experiments. A certain value of the gain error has been found to give an acceptable model prediction in terms of the mean error and standard deviation.