Active noise control systems for broad-band disturbance

In this study we evaluated the performance of an active noise control system for a broad-band disturbance using the method of acoustic pressure minimization at various spaces and frequencies. The technique is squared acoustic pressure minimization. The theory and simulations of pressure minimization over space and frequency using single-channel and two-channel systems are presented. The work presented in this paper is the first part of the study and we only focus on a plane wave primary field with one and two secondary sources for simplicity. A constrained minimization of pressure is introduced, to control pressure at various spaces and frequencies. The results show that a good attenuation is achieved at the microphone location or desired range over space and frequency using a single-channel system. However, a better performance could be achieved using a two-channel system. In the next part of the study more realistic sound fields such as a diffuse field will be investigated.