A hearing-aid apparatus includes an audio collector, an audio processor, a speaker and an inner-ear implant device. The audio collector collects audio information. The speaker generates a sound wave by reference to the audio information. The sound wave is transmitted to an inner ear of a user. The inner-ear implant device is implanted aside a round window of the user for generating an electrical signal encoded by the audio processor based on the audio information to stimulate high frequency auditory nerve cells of the user with an electrode of the inner-ear implant device. The audio wave sent to the inner ear of and the electrical signal stimulating the auditory nerve cells together form an integrated auditory recognition corresponding to the audio information.
