Design of Active Noise Control System Using Phase Shift Network for a Hydraulic Surface Grinder

摘要

In the present research the feedforward method of Active Noise Control (ANC) using Phase Shift Network (PSN) has been proposed for reducing noise generated by a hydraulic Surface Grinder. The PSN was a simple network whose function was to change the phase of the input wave. A passive damping material was used to prepare a duct of 150 mm × 150 mm × 1960 mm for converting multidimensional random noise into a single dimension. The duct was also utilized for housing two speakers employed in the ANC system. The system when installed on the grinder resulted in a total noise reduction of 13.1 dB(A).