부산대학교 도서관

Digital filterbanks in hearing aids employ an array of filters to selectively amplify sound of different frequencies to compensate hearing loss. The use of filterbanks leads to a higher usage of silicon area as there are many filters, each generating a sub-band. Reconfigurable warped digital filter is a Variable Digital Filter (VDF) that can be reconfigured to function as a low-pass, band-pass or high-pass filter with cutoff frequencies that can be varied on-the-go. We propose a system with reconfigurable warped VDF that uses a single prototype filter for generating all the necessary sub-bands. The proposed system automates the generation of the control signals for reconfiguring the filter and pipelines the processing of each sub-band to generate the requisite magnitude response. The proposed architecture is designed to achieve good audiogram matching with minimum matching error.