PERIODIC NOISE CANCELATION USING RESONATOR BASED CONTROLLER

摘要

A resonator based filter bank is proposed as controller in acoustic noise canceling loops where the noise to be suppressed is periodic. The controller consists of resonators at the frequencies of the periodic signal to be suppressed. The paper presents the design procedure for both single and multiple channel case and investigates the behavior of the noise canceling systems. The proposed method is compared to the conventional adaptive feedforward controller updated by the filtered-X LMS algorithm. The resonator based controller shows faster convergence and needs less computations than the usual methods. The advantages of the new controller are demonstrated by a theoretical and a practical example.