Patent ID: 8521298

Claim:
An electrical stimulation method to stimulate nerve fibers, comprising the following steps of: receiving a sound signal by a receiving unit; dividing the received sound signal into a plurality of frequency bands by a processing unit; extracting a spectral peak from each of the frequency bands and determining a stimulation sequence of each frequency bands based on the spectral peaks by the processing unit; selectively driving a plurality of electrode groups in a plurality of cycles based on the stimulation sequence of each frequency band and a determination rule by the processing unit, so that a plurality of stimulation signals corresponding to each of the frequency bands are generated for stimulating nerve fibers; and the determination rule comprising disposing at least one electrode between each of the electrode groups in each of the cycles, avoiding the electrode groups driven in two adjacent ones of the plural cycles from repeatedly using the same electrodes, and disposing at least one electrode between each of the electrode groups in two adjacent ones of the plural cycles; presenting the sound signal through the plurality of stimulation signals; and wherein, two or more of the plurality of electrode groups are stimulated in at least a single one of the plurality of cycles; wherein, all of the stimulated plurality of electrode groups in each cycle are stimulated only when the processing unit follows the determination rule.