Performance Analysis of Feed Forward Broadband Active Noise Control System using Adaptive Algorithms

Abstract: These algorithms have been applied to an extensive number of problems including noise and echo cancelling, channel equalization, signal prediction, adaptive arrays as well as many others. Noise control is the field of acoustical engineering that deals with reducing unwanted sound in the environment An active noise control (ANC) system based on adaptive filter theory was developed in the 1980s; however, only with the recent introduction of powerful but less expensive digital signal processor (DSP) hardware, such as the TMS320 family, these technologies become practical. These specialized DSPs were designed for real-time numerical processing of digitized signals. These devices have enabled the less-cost implementation of powerful adaptive ANC algorithms and encouraged the widespread development of ANC systems. We are presents general background information about ANC methods. Contrasts between passive and active noise control are mentioned. Different types of noise-control algorithms are discussed: feed forward broadband, feed forward narrowband, and feedback algorithms. In this paper detailed design of a simple ANC system using aTMS320 DSP and the implementation of that design.

Keywords: echo cancelling, active noise control, channel equalization, signal prediction