An active harmonic noise equalizer

  • Authors:

  • Min J. Ji;Sen M. Kuo

  • Affiliations:

  • Department of Electrical Engineering, Northern Illinois University, DeKalb, IL;Department of Electrical Engineering, Northern Illinois University, DeKalb, IL

  • Venue:
  • ICASSP'93 Proceedings of the 1993 IEEE international conference on Acoustics, speech, and signal processing: plenary, special, audio, underwater acoustics, VLSI, neural networks - Volume I
  • Year:
  • 1993

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Abstract

This paper presents an Active Harmonic Noise Equalizer (AHNE), which can either amplify or attenuate acoustic narrowband noise. The output of the AHNE system contains narrowband noise components the amplitudes of which can be linearly and arbitrarily controlled by adjusting the gain parameter of the equalizer, thus providing the desired noise shaping capability. Each Single-Frequency Active Noise Equalizer (SFANE) consists of a sinusoidal reference input, a gain parameter and two adaptive weights. A novel pseudo error minimum method is developed in order to effectively use the least mean square algorithm. The transfer function of the SFANE was presented and the behavior of the system was analyzed. Simulations were conducted to verify effectiveness of the algorithm and the validity of the analysis.