노이즈 파워 스케쥴링 기반 온라인 음향 피드백 경로 모델링을 이용한 멀티채널 능동 소음 제어

The performance of the ANC system can be degraded due to an acoustic feedback signal. To solve this problem, the conventional ANC system using an additive random noise for acoustic feedback path modeling. However, the additive noise signal can contribute to the residual noise. In this paper, multi-channel active noise control (ANC) of a linar system with online acoustic feedback path modeling (OFPM) is proposed along with noise power scheduling. In particular, the conventional single-channel linear ANC system with OFPM is further extended to a multi-channel ANC system with a linear acoustic feedback path. The proposed approach not only controls the additive random noise power, but also employs the OFPM using a variable step-size least mean square (VSS-LMS) algorithm to reduce the residual noise. Simulation results demonstrate the effectiveness of the proposed method.