Active Noise Control System without Error Microphone Introducing Primary Path Estimation

Abstract

This letter proposes an ANC system without an error microphone introducing primary path estimation. The proposed system enables adaptively update of a noise control filter to realize the noise reduction at a desired position without placing an error microphone at the target point, by estimating the primary path to the desired position. A computer simulation using impulse responses generated by the image method demonstrates that the proposed system achieves a noise reduction of more than 10 dB at the desired position, even when the noise source moves.