Implementation of 12 Band Integer Filter-Bank for Digital Hearing Aid

Abstract

To compensate for sensorineural hearing loss, audio signals should be amplified selectively and very sensitively. For this, it can pass through a filter-bank structure followed by a gain adjustment block. In this research, we proposed to design a 12 band integer filter-bank that can produce filtered and amplified audio signals without the need for additional amplification. Integer filter-bank also reduces the latency when related to the fractional filter-bank. The proposed method is examined with four audiograms having different kinds of hearing losses. The proposed 12 band integer filter-bank provides minimum matching error with acceptable latency.