Journal of the Institute of Electronics Engineers of Korea SC (전자공학회논문지SC)

The Institute of Electronics and Information Engineers (대한전자공학회)
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Design of a new digital hearing aid based on a multi-band compensation technique

다중밴드 이득 보정기능을 갖는 디지털 청력보정회로 설계

  • Choi Won-Chul (Department of Computer and Communication Engineering, Chungbuk National University) ;
  • Lee Je-Hoon (Department of Computer and Communication Engineering, Chungbuk National University) ;
  • Kim Young-Ju (Department of Computer and Communication Engineering, Chungbuk National University) ;
  • Cho Kyoung-Rok (Department of Computer and Communication Engineering, Chungbuk National University)
  • 최원철 (충북대학교 정보통신학과) ;
  • 이제훈 (충북대학교 정보통신학과) ;
  • 김영주 (충북대학교 정보통신학과) ;
  • 조경록 (충북대학교 정보통신학과)
  • Published : 2004.01.01
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Abstract

In this paper, we propose a new digital hearing aid circuit that compensates the impaired threshold level changing nonlinearly using a multi-band compensation technique. In the algorithm the hearing frequency range 8kHz is divided into 64 bands which is 125Hz resolution. Each band is controlled finely to compensate the hearing impaired proportional to personal ROM table. The multi-band is introduced using a FFT/IFFT Processor which makes to control in frequency domain. As a result, the proposed circuit is more efficient $15\%$ than a conventional ones such as FIR filter architecture in terms of the compensation gun and accuracy. The hardware size was reduced $65\%$ than a general FFT by pre-handling of the input data.

본 논문에서는 감음신경성 난청자의 비선형적으로 변하는 가청 한계값을 보상하는 청력보정회로를 제안한다. 제안된 청력 보정 회로는 주파수 대역에서 직접 보상하기 위해 FFT와 IFFT 프로세서를 사용하고, 회로크기를 줄이기 위해 입력신호 크기 제어 방식을 사용한다. 제안된 청력보정 회로는 기존의 FIR필터 구조가 적용된 청력보정 회로보다 다중밴드 이득 보정이 가능하기 때문에 주파수 보정능력이 감음신경성 난청자에 대해 약 $15\%$이상 향상된 결과를 나타낸다. 입력신호 제어방식 적용으로 입출력 비트가 제한되지 않은 프로세서보다 하드웨어 크기는 $65\%$ 감소된다.

Keywords

References

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