Construction of IIR Filter for Adaptive Noise Control System of Boat Noise Reduction
* Presenting author
Some boat noise is loud and transmitted to the room of the apartments or the companies near the canals in Tokyo. Our aim is the realization of the silence space using damping system with adaptive noise control. Here, we analyzed the characteristic of boat noise and investigated the optimal adaptive filter for the damping of the window vibration at acoustical path D. The investigation was the step size and the taps number of IIR filter to improve the performance with DSP(digital signal processor) of the ANC(adaptive noise control) system. The result showed that the boat noise had composed peak frequency and some dominant frequencies caused by the boat engine which was long noise continuously. Therefore we designed the IIR filter of the adaptive filter effectively. The system showed that the IIR adaptive filter became high performance for the boat noise and the reduction of the boat noise with computer simulation.