METHOD FOR DESIGNING AN AUDIO SIGNAL PROCESSING SYSTEM FOR A HEARING AID, AN AUDIO SIGNAL PROCESSING SYSTEM FOR A HEARING AID, AND A HEARING AID

摘要

A hearing aid tailored to a hearing-impaired person is designed using a sampling value control theory. The method is for designing an audio signal processing system for a hearing aid that is equipped with an AD converter for converting an analog audio signal (yc) input to the hearing aid into a digital audio input signal, a hearing aid digital filter (K (z)) for performing signal processing on the digital audio input signal output from the AD converter, and a DA converter for converting the digital signal output from the hearing aid digital filter into an analog audio output signal to be output to the hearing-impaired person. The hearing aid digital filter (K (z)) is designed using a sampling value control theory in order to reduce the error (ec) between a restored analog signal (zc), that is obtained by filtering the analog audio output signal output from the DA converter using an analog filter (P (s)) that has a property that corresponds to the auditory characteristics of a hearing-impaired person, and the analog audio signal (yc) input to the hearing aid.