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Efficient variable bandwidth filters for digital hearing aid using Farrow structure.
Nisha Haridas1, Elizabeth Elias1
1Department of ECE, National Institute of Technology Calicut, India.
Journal of Advanced Research
|March 12, 2016
Summary
This study introduces a novel variable bandwidth filter using Farrow subfilters for digital hearing aids. This efficient method improves audiogram matching and reduces costs by allowing device reprogramming.
Area of Science:
- Digital Signal Processing
- Audiology
- Biomedical Engineering
Background:
- Digital hearing aid design necessitates filters for accurate audiogram matching.
- Existing methods may lack efficiency and reconfigurability.
Purpose of the Study:
- To propose and evaluate a variable bandwidth filter using Farrow subfilters for digital hearing aids.
- To achieve precise audiogram matching with improved efficiency and reconfigurability.
Main Methods:
- Design of a variable bandwidth filter utilizing Farrow subfilters.
- Frequency shifting and gain adjustment of subfilter bands to match audiograms.
- Evaluation of filter performance for audiogram matching accuracy and complexity.
Main Results:
- The proposed Farrow structure yields lower order filters and superior audiogram matching with reduced errors.
- Implementation complexity is significantly decreased.
- The technique offers cost-effectiveness through device reprogrammability.
Conclusions:
- The Farrow subfilter-based variable bandwidth filter provides an efficient and simple solution for digital hearing aid design.
- This approach enhances audiogram matching accuracy, reduces implementation complexity, and offers user-centric reprogrammability.
- The method presents a cost-effective alternative to traditional hearing aid filter designs.
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