An Integrated Active Noise Control System

Abstract

The study aims at realizing an integrated active noise control system based on a man-machine developing interface environment and DSP architecture. This adaptive system to an application-oriented purpose has been developing for an ultimate goal. of canceling transient rocket firing noise. The system with the man-machine interface takes several features including facilitating the development of other adaptive filtering algorithms and further improvement of existing algorithms, conducting on-line second noise-path identification, and flexibly tuning control parameters, etc. A one-input-three-output active noise controller with the interface of an optional choice of adaptive filtering schemes, and flexible parameter setting has been developed. Additionally, three on-line 2nd path identification schemes have been implemented as well. Both white noise and continual rocket firing noise are tested for the justification of noise suppression performance. Noise reduction can reach 10 and 6 dB, respectively.