The invention relates an auditory prosthesis device for neural stimulation of a patient's hearing, comprising means (20, 56, 58) for providing an input audio signal； a sound processor (24) for generating a neural stimulation signal from the input audio signal； and an implantable stimulation assembly (12) having a plurality of stimulation channels (52) for stimulation of the patient's hearing according to the neural stimulation signal, the sound processor comprising a filterbank (38) for dividing the input audio signal into a plurality of analysis channels (40), each containing a frequency domain signal representative of a distinct frequency portion of the audio signal, means (F1-Fm: D1-Dm) for determining a signal level for each analysis channel by analyzing the respective frequency domain signal, means (44, 46, 48) for generating a neural stimulation signal for each analysis channel according to the respective signal level, a mapping unit (46) for allocating the analysis channels to the stimulation channels according to an adjustable mapping scheme, and a control unit (54) for controlling the mapping unit such that a standard mapping scheme is used in a standard operation mode and a low bandwidth mapping scheme different to the standard mapping scheme is used in a low bandwidth operation mode in which the bandwidth of the input audio signal is lower than in the standard operation mode.La présente invention concerne un dispositif de prothèse auditive pour stimulation neurale d'une écoute de patient, comprenant des moyens (20, 56, 58) de fourniture d'un signal audio d'entrée； un processeur (24) sonore pour génération d'un signal de stimulation neurale à partir du signal audio d'entrée； et un ensemble (12) de stimulation apte à être implanté ayant une pluralité de canaux (52) de stimulation pour stimulation de l'écoute du patient selon le signal de stimulation neurale, le processeur sonore comprenant un banc de filtres (38) pour division du signal audio d'entrée en un
