Title :
Audiogram matching using frequency sampling filters
Author :
McAllister, H.G. ; Black, N D ; Waterman, N. ; Li, M.
Author_Institution :
Dept. of Comput. Sci., Ulster Univ., Jordanstown, UK
Abstract :
A method of producing a more precise audiogram/hearing aid characteristic match is presented. The system uses a frequency sampling filter, consisting of a comb filter exciting a bank of 167 resonators each spaced at 50 Hz intervals over the frequency range 0 to 8.3 kHz. The output of each resonator is individually adjustable by means of a weighting coefficient. The overall filter characteristic can thus be changed by altering the appropriate coefficient. Real-time applications have been investigated using a number of Texas Instrument series digital signal processing (DSP) chips, allowing the gain response of a hearing aid to be tailored to individual needs. A wearable device has been produced based on a floating point version of the DSP chip
Keywords :
acoustic filters; biomedical electronics; digital filters; digital signal processing chips; hearing aids; medical signal processing; 0 to 8.3 kHz; Texas Instrument series digital signal processing chips; audiogram/hearing aid characteristic match; floating point version; frequency sampling filters; gain response; real-time applications; resonators bank; wearable device; weighting coefficient; Auditory system; Convolution; Digital filters; Digital signal processing chips; Filter bank; Finite impulse response filter; Frequency; Hardware; Instruments; Matched filters; Resonator filters; Sampling methods; Switches; Transversal filters;
Conference_Titel :
Engineering in Medicine and Biology Society, 1994. Engineering Advances: New Opportunities for Biomedical Engineers. Proceedings of the 16th Annual International Conference of the IEEE
Conference_Location :
Baltimore, MD
Print_ISBN :
0-7803-2050-6
DOI :
10.1109/IEMBS.1994.412060
