A New Adaptive Controller Compensating Nonlinear Distortions of a Speaker

스피커의 비선형 왜곡을 보정하는 새로운 적응 제어기

  • 권오상 (남서울 대학교 전자공학과)
  • Received : 2014.08.13
  • Accepted : 2014.10.17
  • Published : 2014.10.31


In general, a speaker generates nonlinear distortions owing to a design principle, manufacturing process, and so on, which decreases and changes a sound quality. So, if the speaker is linearized by compensating these nonlinear distortions, the sound quality and satisfaction can be increased. In this paper, a new adaptive controller was proposed to be applied for compensating nonlinear distortions of a speaker. Through computer simulations as well as the analytical analysis, it could be shown that it is possible for both conventional adaptive controller and proposed adaptive controller, to be applied for linearizing the speaker with nonlinear distortions. Also, the simulations results demonstrated that the proposed adaptive controller may have faster convergence speed and better capability of compensating the nonlinear distortion than the conventional adaptive controller with nearly equal computation complexity.


  1. Y. Gong, "A Method of Joint Compensation of Additive and Convolutive Distortions for Speaker-Independent Speech Recognition," IEEE Trans. Speech and Audio Processing, vol. 13, no. 5, Sept. 2005, pp. 975-983.
  2. C. Lee and D. Kim, "Adaptive Noise Reduction of Speech Using Wavelet Transform," J. of the Korea Institute of Electronic Communication Sciences, vol. 4, no. 3, 2009, pp. 190-196.
  3. J. Choi, "Speech and Noise Recognition System by Neural Network," J. of the Korea Institute of Electronic Communication Sciences, vol. 5, no. 4, 2010, pp. 357-362.
  4. G. R. Arce, Nonlinear Signal Processing. Hoboken, NJ : John Wiley & Sons, 2005.
  5. S. Martin, The Volterra and Wiener theories of nonlinear systems. New York: Wiley, 2006.
  6. W. Ji and W. Gan, "Identification of a parametric loudspeaker system using an adaptive Volterra filter," Applied Acoustics, vol. 73, 2012, pp. 1251-1262.
  7. L. P. Hecka, Y. Konigb, M. K. Sonmezc, and M. Weintrauba, "Robustness to telephone handset distortion in speaker recognition by discriminative feature design," Speech Communications, vol. 31, issues. 2-3, June 2000, pp. 181-192.
  8. T. Ishikawa, K. Nakashima, Y. Kajikawa, and Y. Nomura, "A Consideration on Elimination of Nonlinear Distortion of the Loudspeaker System by Using Digital Volterra Filter," Electronics and Communications in Japan, Part 3, vol. 83, no. 2, 2000, pp. 110-118.<110::AID-ECJC10>3.0.CO;2-X
  9. C. Lee and C. Lee, "Radiational characteristics of speaker directivity using active control," J. of the Korea Institute of Electronic Communication Sciences, vol. 7, no. 1, 2012, pp. 27-31.