Local silencing of room acoustic noise using broadband active noise control

Adaptive filtering techniques are now in widespread use for a number of applications such as adaptive arrays, adaptive noise cancellation, adaptive line enhancement, adaptive modeling and system identification, adaptive equation, and adaptive echo cancellation. These techniques have also been applied to the expanding field of active noise control. In this paper, an application of active noise control to the silencing of acoustic noise in a room is considered. First, a theoretical performance analysis using measured room impulse responses is presented. Then an experiment is described that uses a commercially available active noise control signal processor.<>