Active noise control in the global region of a duct using smart foam and FIR filter optimization of cancellation Path

스마트 폼을 이용한 덕트 내 넓은 영역에서의 소음 제어 및 상쇄 경로 최적화

ANC technic can overcome the limited performance of passive noise control at the low frequency range. But it has the local quiet control region in general. In this paper, it is discussed that the global noise control in a circular duct using a ring type smart foam and a porous material. LMS algorithm and RLS algorithm are used to find optimal orders of cancellation path. Experiments are performed to compare the efficiency of RLS algorithm with that of LMS algorithm.