Audio Compensation with Cascade Biquad Filters for Feedback Active Noise Control Headphones

In active noise control (ANC) headphones, the audio signal is modified together with primary if a feedback controller used. Although this problem can be alleviated an FIR model of secondary path, practical implementations are usually restricted by its computational complexity. paper, cascade biquad filters used to compensate for modification system. Instead using classical identification methods IIR model, compensation fixed through optimization process. An objective function evaluating comprehensive performance proposed, whose minimum value obtained differential evolution (DE) algorithm. Simulations and experiments carried out, results validate effectiveness efficiency proposed method. The averaged error reduced about 0.5 dB only two five filters.