한국음향학회지 (The Journal of the Acoustical Society of Korea)

  • 제35권4호
  • /
  • Pages.272-279
  • /
  • 2016
  • /
  • 1225-4428(pISSN)
  • /
  • 2287-3775(eISSN)
한국음향학회 (The Acoustical Society of Korea)
권호 표지
DOI QR코드

DOI QR Code

주파수 대역에서의 피드백 제거 알고리즘의 보청기 응용

Hearing aid application of feedback cancellation algorithm in frequency domain

  • Jarng, Soon-Suck (Dept. of Electronics Engineering, Faculty of Electronics and Information Engineering)
  • 투고 : 2016.04.21
  • 심사 : 2016.05.24
  • 발행 : 2016.07.31
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

본 논문은 보청기의 피드백 제거 알고리즘을 실시간으로 실현한 내용을 다루었다. 기존의 시간 영역에서의 최소 평균 자승 기법을 주파수 영역으로 변환하여 처리함으로써 계산상의 부하를 최소화하였다. 적응 필터 알고리즘의 확인은 Matlab(Matrix laboratory) 기반으로 수행하였고, 이를 CSR 8675 블루투스 DSP IC(Digital Signal Processor Integrated Circuit) 칩 펌웨어로 실현하고 검증해보였다. 스마트폰으로의 원격 무선 제어 기능이 포함된 스마트 보청기는 사용자 접근 편의성이 강화된다.

In this paper, the realization of a hearing aid adaptively cancelling feedback noise was considered. Conventional least mean square method in time domain was transformed into frequency domain in order to minimize computational burden. The adaptive filter algorithm was evaluated by Matlab (Matrix laboratory), and it was confirmed by CSR 8675 Bluetooth DSP IC (Digital Signal Processor Integrated Circuit) chip firmware realization. Some remote control features by a smart phone was added to the smart hearing aid for user interface easiness.

키워드

참고문헌

  1. D. Gauger and R. Sapiejewski, "The bose headset system: background, description and applications," Bose Co., Massachusetts, (1989).
  2. P. Rubak, L.G. Johansen, and K. Hermansen, "Adaptive noise cancelling in headsets," Proc. of Nordic Acoustical Meeting, NAM'96, Helsinki, Finland, 99-104 (1996).
  3. S. Haykin, Adaptive Filter Theory (Prentice-Hall, NewYork, 1991), pp. 231-312.
  4. Bose, Amar, Headphoning, Patent: US4,455,675 (1984).
  5. C. Moy, Active Noise Reduction Headphone Systems, http://headwize.com/tech/anr_tech.htm, 2001.
  6. O. S. Kwon, "Enhanced multi-channel adaptive noise control compensating nonlinear distortions" (in Korean), J. Acoust. Soc. Kr. 34, 46-51 (2015). https://doi.org/10.7776/ASK.2015.34.1.046
  7. S. W. Kim, J. H. Seo, Y. W. Ryu, Y. C . Park and D. H. Youn, "A robust frequency-domain multi-reference narrowband adaptive noise canceller" (in Korean), J. Acoust. Soc. Kr. 34, 163-170 (2015). https://doi.org/10.7776/ASK.2015.34.2.163
  8. S. C. Pohlig, "A filter bank structure for adaptive nulling", in Proc. 21st Asilomar Conf. Signals, Systems, Computers, Pacific Grove, California, 458-462 (1987).
  9. J. J. Shynk, "Frequency-domain and multirate adaptive filtering," IEEE Signal Process. Magazine 9, 14-37 (1992). https://doi.org/10.1109/79.109205
  10. S. W. Lee and H. C. Park, "Echo canceller with improved performance in noisy environments" (in Korean), J. Acoust. Soc. Kr. 22, 261-268 (2003).
  11. S. S. Jarng, "Acoustic wireless communication from smart phone to hearing aid" (in Korean), J. Acoust. Soc. Kr. 34, 91-97 (2015). https://doi.org/10.7776/ASK.2015.34.2.091