피드포워드와 피드백 알고리즘의 연성을 줄이는 새로운 하이브리드 능동소음제어 알고리즘

Passive noise control is simple and effective way to reduce noise. But passive noise control is not effective at low frequency. So ANC(active noise control) is used to use to solve this problem. The algorithm of ANC is mostly used FXLMS(Filtered-X LMS) algorithm. Feedforward FXLMS algorithm suffers from low correation with reference signal and noise signal. Feedback ANC algorithm suffers from causality. To complement weakness of two algorithms, hybrid ANC algorithm is used. Conventional hybrid ANC algorithm also suffers from coupling of two algorithm that can cause destabilization. So, this paper Proposes new hybrid ANC algorithm that reduces each algorithm’s destabilization.