Title :
A digital filterbank hearing aid-design, implementation and evaluation
Author :
Lunner, Thomas ; Hellgren, Johan
Author_Institution :
Linkoping Univ., Sweden
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 :
digital filters; digital signal processing chips; hearing aids; TMS320E25; digital filterbank hearing aid; digital signal processor; interpolated linear phase impulse-response filters; portable processor; real-time evaluations; Auditory system; Delay; Digital filters; Digital signal processing; Filter bank; Finite impulse response filter; Frequency response; Hearing aids; Irrigation; Power supplies;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 1991. ICASSP-91., 1991 International Conference on
Conference_Location :
Toronto, Ont.
Print_ISBN :
0-7803-0003-3
DOI :
10.1109/ICASSP.1991.151068
