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Systematic Hearing Performance Evaluation Process for Adolescents with Cochlear Implantation at Early Ages
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Hardware-efficient auto-reconfigurable hearing aids using 3-level octave interpolated filters for auditory
1APJ Abdul Kalam Technological University, Thiruvananthapuram, Kerala, India. tomsondevis@gmail.com.
Physical and Engineering Sciences in Medicine
|July 6, 2021
Summary
This study introduces a novel, low-complexity reconfigurable hearing aid with auto-adapting capabilities for diverse hearing impairments. The device efficiently matches audiograms, reducing setup time and enabling cost-effective solutions.
Area of Science:
- Electrical Engineering
- Biomedical Engineering
- Signal Processing
Background:
- Traditional hearing aids require hardware modifications for different hearing disabilities.
- Manual audiogram matching is time-consuming and requires expert intervention.
Purpose of the Study:
- To propose a novel, low-complexity, auto-reconfigurable hearing aid.
- To enable automatic adaptation to various hearing impairments (mild to severe).
- To reduce the time and complexity of hearing aid fitting.
Main Methods:
- Dividing the audio spectrum into three regions with four adaptive schemes each.
- Automatic selection of optimal schemes based on individual hearing thresholds.
- Utilizing octave and fractional interpolation with a Parks-McClellan filter for sub-band generation.
Main Results:
- The proposed structure uses only 18 coefficient multipliers, achieving up to 92% savings.
- Delay and matching errors are within acceptable global limits.
- Hardware implementation on FPGA confirmed a compact and power-efficient design.
Conclusions:
- The auto-reconfigurable hearing aid effectively caters to a wide range of hearing disabilities.
- The system minimizes manual intervention, significantly reducing fitting time.
- The low complexity enables cost-effective manufacturing of advanced hearing aids.
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