There is provided a system for stimulation of a patient's ipsilateral cochlea (200), comprising: at least two spaced apart microphones (20, 20A, 60, 60A, 160, 160A, 220, 220A) worn by the patient for providing a first input audio signal and a second audio signal from ambient sound, respectively； a sound processor (24) for generating an ipsilateral auditory nerve stimulation signal in a plurality of output channels from at least one of the input audio signals； and a stimulation assembly (19) for being implanted within the ipsilateral cochlea and having a plurality of stimulation channels for ipsilateral stimulation of the patient's hearing according to the ipsilateral auditory nerve stimulation signal, the sound processor comprising a DOA unit (66) for determining periodically a main direction of incidence of ambient sound from a sound source by analyzing the first and second audio signals, and a directional information coding unit (68) for coding information concerning the determined main direction of incidence in the ipsilateral auditory nerve stimulation signal in manner so as to render said directional information perceivable by the patient in order to enable the patient to localize the sound source by ipsilateral cochlear stimulation.L'invention concerne un système de stimulation de la cochlée homolatérale d'un patient (200), ledit système comportant : au moins deux microphones séparés et espacés (20, 20 A, 60, 60 A, 160, 160 A, 220, 220 A), portés par le patient, pour fournir un premier signal audio d'entrée et un second signal audio provenant d'un son ambiant, respectivement； un processeur sonore (24) pour générer un signal de stimulation du nerf auditif homolatéral dans une pluralité de canaux de sortie depuis au moins un des signaux audio d'entrée； un ensemble de stimulation (19) à implanter dans la cochlée homolatérale et ayant plusieurs canaux de stimulation pour une stimulation homolatérale de l'audition du patient selon le signal de stimulation du nerf a
