A digital filterbank hearing aid-design, implementation and evaluation
- 1 January 1991
- conference paper
- Published by Institute of Electrical and Electronics Engineers (IEEE)
- No. 15206149,p. 3661-3664 vol.5
- https://doi.org/10.1109/icassp.1991.151068
Abstract
A digital filterbank that can be used in a hearing aid is proposed. Complementary interpolated linear phase impulse-response filters are used to minimize the number of multiplications per sample. The filterbank has eight bands, each with sidelobes of about 40 dB. It can be realized with a total of 27 multiplications. If a multiplication with 0.5 is implemented as a shift, then the total will be 19. The hearing aid was implemented on a general-purpose digital signal processor for real-time evaluations. A portable processor system based on Texas TMS320E25 was constructed for testing under real-world conditions.Keywords
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