능동소음제어를 이용한 고속철도 KTX의 실내소음 저감을 위한 모델링에 관한 연구

In this paper, experiments were conducted to validate the importance and necessity of modeling. The modeling was performed using 120㎐ and 280㎐ noise of KTX main interior noise frequency. After the modeling, In order to solve the system instability by the additional path that exists between the control speaker and the error microphone, the secondary path was estimated. Next, simulations were performed to verify the modeling’s necessity and importance. Thought the simulation results, we confirmed that the system with the modeling is more effective for noise reduction than without the modeling.