The invention provides an electrical
auditory prosthesis signal processing method, and belongs to the field of
medical instruments. The method comprises the following steps: firstly utilizing a band-pass filter group to carry out filtering on a collected sound
signal; extracting a slow-varying
signal u<k>(t) after signals x<k>(t) output by all band-pass filters are subjected to the downward
frequency shift to a low-frequency range, wherein in the downward
frequency shift processing procedure, the movable frequency of the x<k>(t) is equal to lower
cut-off frequency fcl<k> of a kth band-pass filter minus the lowest frequency fl<k> of a kth
electrode channel within a time-domain
pitch processing range; finally, processing the extracted slow-varying signal u<k>(t), and modulating the processed slow-varying
signal on a carrier wave to be transmitted out. According the method,
frequency allocation of the band-pass filters is realized through the time-domain processing capability in a
single electrode channel of an
implant user, the slow-varying signal is extracted according to the time-domain processing capability of the
single electrode channel, and the extracted slow-varying signal can be transmitted to
auditory nerves near to corresponding electrodes, so that the overall
sound perception of the
implant user can be improved.