Reconfigurable low complexity hearing aid system using adjustable filter bank

This paper proposes a reconfigurable filter bank structure for hearing aid application. The proposed structure consists of two stages namely, masking stage and multiple passband generation stage. Multiple passband generation stage includes different levels for generation of sub-bands. In this paper it is shown that, the proposed reconfigurable filter bank can be used to match different types of audiograms within tolerable delay and matching error by adjusting the order of the prototype filters. The hardware complexity for the proposed structure is also very low, since only two prototype filters are used for the generation of all the sub-bands.