I agree with Prof. Jan Schnupp that some pre-assumptions are necessary for your problem. In one of my research projects, I simulated the auditory nerve responses of spatialized signals using the zillany2018 model, and their Direction of Arrival was estimated using the dietz2011 model. However, I found that the responses were interpretable only for fine structure data, not envelopes.
From my understanding, the Dietz model considers only sound sources within the frontal hemifield. For front-back localization, you could use cross-frequency integration to detect the high-frequency attenuation caused by the pinna, allowing you to determine whether the sound source is in front or back hemifield. This can then be followed by the Dietz model to estimate the DoA, as ITD and ILDs are nearly identical for front and back azimuths.
Best regards,
-- Sathish Kumar
PhD Research Scholar
Department of Audiology and SLP
Kasturba Medical College (MAHE), Mangalore
Mob: 9789447666 || E-mail: sathish.sreeni58@xxxxxxxxx