Patent ID: 8908893

Claim:
A hearing apparatus, comprising: a filter bank system including: a multi-stage analysis filter bank configured to break down an input signal of the hearing apparatus into a plurality of partial band signals by a plurality of filter bank channels, the multi-stage analysis filter bank including a first stage having a filter bank and a second stage having a plurality of filter banks distributed in the second stage of the multi-stage analysis filter bank, the plurality of filter bank channels of the filter bank in the first stage and of the plurality of filter banks in the second stage being in a hierarchical formulation; a multi-stage synthesis filter bank to recombine partial band signals of the plurality of filter bank channels of the multi-stage analysis filter bank, the multi-stage synthesis filter bank including at least a first stage and a second stage, the first stage of the multi-stage analysis filter bank having a plurality of filter banks distributed therein, the second stage of the multi-stage analysis filter bank having a filter bank with a plurality of filter bank channels in a hierarchical formation; and an equalization filter connected to one of the plurality of filter bank channels of the multi-stage analysis filter bank or of the first stage of the multi-stage synthesis filter bank and of the filter banks of the second stage of the multi-stage filter bank.